noun🔗Share引理，辅助性定理. A proposition proved or accepted for immediate use in the proof of some other proposition."In geometry class, we used a few lemmas, like "all right angles are congruent," to prove the more complex Pythagorean theorem. "在几何课上，我们用了一些引理，比如“所有直角都相等”，来证明更复杂的勾股定理。mathlogictheoryChat with AIVocabulary GamePractice Reading
noun🔗Share词元, 词位 The canonical form of an inflected word; i.e., the form usually found as the headword in a dictionary, such as the nominative singular of a noun, the bare infinitive of a verb, etc."When creating a vocabulary list, the teacher instructed the students to include the lemmas, like "run" for "running" and "good" for "better," instead of just the inflected forms they found in the text. "创建词汇表时，老师指示学生包含词元，比如用“run”代替“running”，用“good”代替“better”，而不是只写他们在课文中找到的屈折变化形式。linguisticsgrammarwordChat with AIVocabulary GamePractice Reading
noun🔗Share词元，词位 (psycholinguistics) The theoretical abstract conceptual form of a word, representing a specific meaning, before the creation of a specific phonological form as the sounds of a lexeme, which may find representation in a specific written form as a dictionary or lexicographic word."While searching for the right word to describe her feelings, Sarah knew the lemmas representing "sadness" and "disappointment" were relevant, but she couldn't quite find the exact word to express the specific shade of emotion she felt. "在努力寻找合适的词语来形容她的感受时，莎拉知道代表“悲伤”和“失望”这两个词位的概念是相关的，但她始终无法找到确切的词语来表达她感受到的那种微妙的情绪。linguisticswordlanguagemindtheorycommunicationscienceeducationChat with AIVocabulary GamePractice Reading
noun🔗Share果壳，外壳 The outer shell of a fruit or similar body."After husking the corn, we noticed the lemmas were very thin and easily peeled away. "给玉米脱粒后，我们发现它的果壳很薄，很容易剥掉。fruitplantbiologyChat with AIVocabulary GamePractice Reading
noun🔗Share颖片，外稃。 One of the specialized bracts around the floret in grasses."The botanist carefully examined the grass florets, noting the color and shape of the lemmas surrounding each one. "植物学家仔细检查了草的小花，记录了围绕着每一朵小花的**颖片（外稃）**的颜色和形状。plantbiologypartChat with AIVocabulary GamePractice Reading
