Ecosystems
n. <生>生态系统( ecosystem的复数形式 )
🗣️ 情景例句
I've decided to stay at home and be a full-time mother.
我决定留在家里做一个专职母亲。
At what time?
什么时间？
The characters on the paper were white, and the rest of the paper was black.
纸上的汉字呈白色，其余部分成黑色。