Methylotrophy
甲基营养
🗣️ 情景例句
Yes, I am.
是的，我是。
See you later.
待会见。
Everyone knows that if he shouts in the vicinity of a wall or a mountainside, an echo will come back.
大家都知道，在墙壁或山腰附近发出的喊声，就会听到回声。