Sputamentum
[医] 痰
🗣️ 情景例句
I majored in economic and trade English.
我主修的是经贸英语。
Which American singer do you like to listen to?
你喜欢哪个美国歌星的歌曲？
It is bacteria that have generated the oxygen we breathe on earth.
正是细菌生产出我们在地球上呼吸的氧气。