Saproplankton
[生]污水浮游生物
🗣️ 情景例句
You ready for the next problem?
你准备好做下一道题了吗？
The doctor said it's just a mosquito bite, There's nothing to worry about.
医生说只是被蚊子咬了一口，不需要担心。
I came here last month.
我上个月到这儿。