noun🔗Share阿阿熔岩 A form of lava flow associated with Hawaiian-type volcanoes, consisting of basaltic rock, usually dark-colored with a jagged and loose, clinkery surface. Compare pahoehoe."Walking across the aa was difficult because its sharp, broken surface made every step painful. "穿越阿阿熔岩非常困难，因为它锋利破碎的表面让每一步都疼痛难忍。geologynatureChat with AIVocabulary GamePractice Reading
noun🔗Share实际年龄 Initialism of acting age."The casting director asked for the actress's resume, specifically noting her aa was sixteen, even though she was actually twenty-one. "选角导演要了女演员的简历，特别指出她的实际年龄看起来像十六岁，即使她实际上已经二十一岁了。entertainmentagestageChat with AIVocabulary GamePractice Reading
noun🔗ShareA-a梯度，肺泡动脉。 Initialism of alveolar-arterial."The doctor ordered a blood gas test to calculate the patient's AA gradient and assess their lung function. "医生开了血气分析，以计算病人的A-a梯度，评估他们的肺功能。medicineChat with AIVocabulary GamePractice Reading
noun🔗Share约略绝对, 近似绝对 Initialism of approximate absolute."The accountant estimated the building's value at $500,000, but added that this was an aa, subject to a professional appraisal. "会计师估计这栋楼的价值为五十万美元，但补充说这只是一个约略绝对值，需要经过专业的评估才能确定。technicalsciencemathChat with AIVocabulary GamePractice Reading
noun🔗Share加速器，电枢加速器。 Initialism of armature accelerator."The robotics team is working on improving the robot's speed by optimizing the AA during the motor calibration process. "机器人团队正在努力通过优化电机校准过程中的**电枢加速器(AA)**来提高机器人的速度。technologyphysicselectronicsmachineChat with AIVocabulary GamePractice Reading
noun🔗Share升主动脉，主动脉升部。 Initialism of ascending aorta."The cardiologist pointed to the diagram, explaining that the AA carries blood directly from the heart. "心脏科医生指着图表解释说，**升主动脉（主动脉升部）**直接将血液从心脏输送出去。medicineanatomyorganbodyChat with AIVocabulary GamePractice Reading
noun🔗Share原子吸收 Initialism of atomic absorption."The lab technician used AA to determine the lead concentration in the water sample. "实验室技术员使用原子吸收光谱法 (AA) 测定了水样品中的铅浓度。chemistrysciencetechnicalChat with AIVocabulary GamePractice Reading
noun🔗Share作者修改，原作者修订 Initialism of author's alteration.""The editor flagged several instances of 'AA' in the manuscript, asking the author to clarify the changes made after the initial submission." "编辑在手稿中标记了几处“作者修改（作者修订）”，要求作者说明最初提交后所做的修改。writinggrammarliteraturecommunicationChat with AIVocabulary GamePractice Reading
noun🔗Share平均观众，平均听众 Initialism of average audience."The TV network increased its advertising rates after achieving a higher AA than expected in the target demographic. "这家电视台在目标受众群体中获得了高于预期的平均观众人数，之后提高了广告费率。mediaentertainmentbusinessChat with AIVocabulary GamePractice Reading
adjective🔗Share极地高山的 Initialism of arctic-alpine."The students researched the aa plant communities in their environmental science class. "学生们在环境科学课上研究了极地高山植物群落。environmentnaturebiologyChat with AIVocabulary GamePractice Reading
adjective🔗Share始终漂浮的，永不下沉的 Initialism of always afloat."The Coast Guard requires that all vessels contracted for emergency response be aa and ready for immediate deployment. "海岸警卫队要求所有签订紧急响应合同的船只都必须始终漂浮，并随时准备好立即部署。nauticalsailingChat with AIVocabulary GamePractice Reading
noun🔗Share醋酸 A clear colourless organic acid, CH3COOH, formed by the oxidation of ethanol; it is used as a solvent and has very many industrial applications; it is the major acidic component of vinegar."To clean the coffee maker, she mixed aa with water. "为了清洁咖啡机，她把醋酸和水混合在一起。substancechemistrybiochemistryfoodindustryChat with AIVocabulary GamePractice Reading
noun🔗Share氨基酸 Any organic compound containing both an amino and a carboxylic acid functional group."Proteins are complex aas that are essential for building and repairing tissues in the body. "蛋白质是复杂的氨基酸，对身体组织构建和修复至关重要。biochemistrycompoundchemistrybiologysubstancescienceChat with AIVocabulary GamePractice Reading
noun🔗Share氨基酸 Any of the twenty naturally occurring α-amino acids (having the amino, and carboxylic acid groups on the same carbon atom), and a variety of side chains, that combine, via peptide bonds, to form proteins."Nutritionists emphasize the importance of a balanced diet to ensure we get all the essential aa our bodies need to build and repair tissues. "营养学家强调均衡饮食的重要性，以确保我们摄入身体所需的所有必需氨基酸，用于构建和修复组织。biochemistrybiologychemistryphysiologysubstancestructuremedicinescienceorganismChat with AIVocabulary GamePractice Reading
noun🔗Share氨基丙酮 1-amino-2-propanone, a secondary amino ketone"Example Sentence: "In the chemistry lab, the researcher carefully synthesized aa (1-amino-2-propanone) as a key intermediate for the synthesis of a novel drug." "在化学实验室里，研究人员小心翼翼地合成了氨基丙酮 (aa)，将其作为合成一种新型药物的关键中间体。compoundchemistrybiochemistryChat with AIVocabulary GamePractice Reading
noun🔗Share花生四烯酸 A long-chain polyunsaturated fatty acid, having 20 carbon atoms and four double bonds, found in animal fats; it is essential for human nutrition, being a precursor to the production of prostaglandins."To maintain good health, it's important to include sources of AA in your diet, as it helps the body make substances important for regulating inflammation. "为了保持健康，饮食中包含一些**花生四烯酸（AA）**的来源很重要，因为它有助于身体产生对调节炎症至关重要的物质。biochemistryphysiologymedicinesubstancechemistryfoodbiologysciencebodyChat with AIVocabulary GamePractice Reading
adjective🔗Share等量的，各一份 Abbreviation of ana."To ensure the pharmacist correctly dispenses equal parts of each ingredient, the prescription reads "Ingredient A 50mg, aa Ingredient B." "为确保药剂师正确配发等量的各种成分，处方上写着“成分A 50毫克，另成分B等量”。medicinewordChat with AIVocabulary GamePractice Reading
