Ketoestrone
酮雌(甾)酮
🗣️ 情景例句
Robots can be used for many tasks which are considered too dangerous for people to do.
机器人能完成许多对人类来说是很危险的任务。
A chain is no stronger than its weakest link.
链条的坚固程度取决于它最薄弱的环节。
After I had sat down, he said that business was very bad.
待我坐下后，他说生意非常不景气。