Biofilms
n. 生物膜（biofilm的复数）
🗣️ 情景例句
What's your problem, Mike?
你现在问题在哪 ，Mike？
Flowers make no difference to a room.
一个房间里有没有鲜花并没有很大的差别。
OK. We can get some more tomorrow. We should finish the floor now. Can you take the other end of this piece of wood? Now you have to pull it to make the surface smooth like that.
好吧。我们明天再多买些。现在我们应该把地板弄好。你能抓住木板的另一端吗？现在你要来回拉动木板，使它的表面象那块儿木板一样光滑。