noun🔗Share睡觉的人, 睡眠者 Someone who sleeps."The kindergarten teacher gently woke the sleepers after nap time. "午睡时间结束后，幼儿园老师轻轻地叫醒了那些正在睡觉的孩子。personhumanChat with AIVocabulary GamePractice Reading
noun🔗Share休眠条款，搁置条款。 That which lies dormant, as a law."Even though the old regulation about school uniforms seemed forgotten, it turned out to be one of the sleepers; the principal suddenly enforced it again after years of ignoring it. "即使关于校服的旧规定似乎已经被遗忘，但它实际上是一个休眠条款；校长在忽略它多年后，突然又重新开始执行。lawpoliticsChat with AIVocabulary GamePractice Reading
noun🔗Share潜伏特工，卧底。 A spy, saboteur, or terrorist who lives unobtrusively in a community until activated by a prearranged signal; may be part of a sleeper cell."After the war, authorities discovered several sleepers who had been living as ordinary citizens for years, waiting for orders. "战争结束后，当局发现了几个潜伏特工，他们多年来一直像普通公民一样生活，等待指令。politicsmilitarywarpolicegovernmentpersonorganizationactionsocietyChat with AIVocabulary GamePractice Reading
noun🔗Share防耳洞闭合的耳钉，养耳洞耳钉。 A small starter earring, worn to prevent a piercing from closing."After getting my ears pierced, I wore small gold sleepers to keep the holes from closing up. "打了耳洞之后，我戴了小小的金耳钉（养耳洞耳钉），防止耳洞闭合。wearbodyitemappearanceChat with AIVocabulary GamePractice Reading
noun🔗Share卧铺车厢, 寝车 A railway sleeping car."We spent a night on an uncomfortable sleeper between Athens and Vienna."我们在雅典和维也纳之间的一趟卧铺车厢里过了一夜，那趟车的卧铺很不舒服。vehicleChat with AIVocabulary GamePractice Reading
noun🔗Share锁喉，裸绞 A sleeper hold."The wrestler applied a tight sleepers, cutting off blood flow to his opponent's brain. "这位摔跤手使出了一记紧紧的锁喉，切断了对手大脑的血液供应。sportactionbodyChat with AIVocabulary GamePractice Reading
noun🔗Share黑马，潜力股 Something that achieves unexpected success after an interval of time."A box-office bomb when it first came out, the film was a sleeper, becoming much more popular decades after being released."这部电影刚上映时票房惨败，但后来却成了一匹黑马，在上映几十年后才变得非常受欢迎。achievementbusinessoutcomeChat with AIVocabulary GamePractice Reading
noun🔗Share塘鳢，沙塘鳢. A goby-like bottom-feeding freshwater fish of the family Odontobutidae."The aquarium contained several sleepers, small fish that lived on the bottom of the tank. "水族箱里养了几条塘鳢，这些小鱼生活在水箱底部。fishanimalChat with AIVocabulary GamePractice Reading
noun🔗Share睡鲨 A nurse shark (family Ginglymostomatidae)."The scuba divers were excited to spot several sleepers resting peacefully on the sandy ocean floor. "水肺潜水员们很兴奋地发现了几条睡鲨安静地躺在沙质的海底。fishanimalbiologyoceanChat with AIVocabulary GamePractice Reading
noun🔗Share连体睡衣，睡袋。 A type of pajama for a person, especially a child, that covers the whole body, including the feet."Aaron, Devin, and Laura looked so comfy in their sleepers."亚伦、德文和劳拉穿着他们的连体睡衣，看起来真舒服。wearitemfamilyChat with AIVocabulary GamePractice Reading
noun🔗Share扮猪吃老虎的车, 低调高性能车 An automobile which has been internally modified to excess, while retaining a mostly stock appearance in order to fool opponents in a drag race, or to avoid the attention of the police."My neighbor's old, beat-up sedan is one of those "sleepers"; it looks slow, but it actually has a powerful engine hidden under the hood. "我邻居那辆破旧的旧轿车就是那种“扮猪吃老虎的车”；它看起来很慢，但实际上引擎盖下隐藏着强大的动力。vehicletechnologysportpoliceactionstyleappearancemachinetechnicalChat with AIVocabulary GamePractice Reading
noun🔗Share安眠药，镇静剂 A sedative."The doctor prescribed some mild sleepers to help my grandmother rest after her surgery. "医生开了一些温和的安眠药，帮助我奶奶术后休息。medicineChat with AIVocabulary GamePractice Reading
noun🔗Share枕木，轨枕 A railroad tie."The train rumbled over the tracks, its wheels clicking on the sleepers beneath. "火车隆隆地驶过铁轨，车轮咔哒咔哒地敲击着下面的枕木。structurebuildingmaterialtechnicalindustrymachineChat with AIVocabulary GamePractice Reading
noun🔗Share托梁，横梁. A structural beam in a floor running perpendicular to both the joists beneath and floorboards above."The construction crew carefully laid the sleepers on the concrete foundation before installing the hardwood floor. "施工队在安装硬木地板之前，小心地将**托梁（横梁）**铺设在水泥地基上。architecturebuildingstructureChat with AIVocabulary GamePractice Reading
noun🔗Share舱底龙骨，卧材 A heavy floor timber in a ship's bottom."The shipwright carefully inspected the sleepers in the hull to ensure they could support the heavy cargo. "造船工匠仔细检查了船体内的舱底龙骨/卧材，以确保它们能够支撑住沉重的货物。nauticalpartmaterialstructureChat with AIVocabulary GamePractice Reading
noun🔗Share垫木, 底层木桶 The lowest, or bottom, tier of casks."The strongest sleepers in the brewery's barrel stack had to bear the weight of all the casks above them. "啤酒厂桶堆里最结实的垫木/底层木桶必须承受上面所有木桶的重量。materialindustryChat with AIVocabulary GamePractice Reading
