Prevel's sign
[医] 普雷韦耳氏征(病人体位改变时的一种心脏体征)
🧩 词语组成解析
🗣️ 情景例句
It's complicated.
原因很复杂。
It's a once in a lifetime chance.
这是一生难得的机会。
Then knowledge began to be accumulated according to a systematic plan.
于是，知识便开始有系统有计划地积累起来。