Macdougal's theory
[医] 麦克杜加耳氏学说(生物学)
🧩 词语组成解析
🗣️ 情景例句
since her mother died.
因为她妈妈去世了。
Buck up, Billy, Enjoy yourself.
振作起来，比利，快快活活地过日子。
This is what we need.
我们要的就是这个。