Boyce's sign
[医] 波依斯氏征(食管憩室的一种颈部听诊体征)
🧩 词语组成解析
🗣️ 情景例句
This is my sister Susan.
这是我妹妹Susan。
You have too much time on your hands. Why don't you start a hobby?
你有太多的空闲时间，何不开始一样嗜好呢？
Because they destroy so many insects, and insects include some of the greatest enemies of the human race.
因为它们能消灭那么多的昆虫，其中包括一些人类的大敌，