Paramutualism
兼性互惠共生
🗣️ 情景例句
They took every last dime.
他们拿走了所有的钱。
My brother and I used to go a lot of places together.
我的兄弟和我过去常一起去很多地方。
Where did you learn to speak English?
你从哪里学会说英语的呢？