🗣️ 情景例句
Why are you in such a good mood?
你怎么心情这么好？
When the lights went out, I was washing my hair.
当熄灯的时候，我在洗头。
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。