Biofilms
n. 生物膜（biofilm的复数）
🗣️ 情景例句
Five hundred dollars, please. And could you give me ten dollar in small change?
请换500美元。再另外能否给我10元的小面额零钱？
You can't have it both ways.
你不能兼而有之。
It's very smart.Short skirts are in fashion now.
它很时髦。短裙现在很流行。