Primitive thoracic fold
[医] 原胸褶
🧩 词语组成解析
primitive
['prɪmətɪv]
adj. 原始的;发展水平低的;落后的;[生物学]原生的;
n. 原始人;早期的艺术家（作品）;单纯的人：不世故的人;自学的艺术家;
prim第一，主要+itive形容词后缀 →原始的
a. 胸的\\n[医] 胸的, 胸廓的
fold
[fold]
vt. 折叠;合拢;抱住;笼罩;
vi. 折叠起来;彻底失败;
n. 折痕;信徒;羊栏;（起伏地的）凹处，洼;
🗣️ 情景例句
You've been a very helpful.
你帮了大忙。
John could not decide when to leave.
约翰无法决定几时要出发。
she rang up her daughter and asked for her help in what she described as a little spot of bother.
她只得打电话向女儿求援，说她碰到了一点儿小麻烦。