Gerhardt's sign
[医] 格哈特氏征(见于主动脉瘤、气胸及肺结核)
🧩 词语组成解析
🗣️ 情景例句
I can only stay a few minutes.
我只能停留几分钟。
Congratulation!
恭喜！
It was not forced upon them by the survival competition; they could have caught and lived on prey without using poison, just as the thousands of non-poisonous snakes still do.
毒液不是生存竞争强加给它们的，它们也可以不用毒液捕捉动物而生存，就像今天成千上万的无毒蛇那样。