視頻對話：
What are you talking about? Breaking open the coral?
你什么意思？把珊瑚打破？
They're little filters.
它們可是小型過濾器。
Okay. When the EPA comes after us I'm going to tell them it was your idea.
好吧，要是環保局來查咱倆，我就說都是你的主意。
本期學習詞匯：
filter
n.濾波器；濾光器；濾色鏡；[化]過濾器；
vi.過濾；透過；滲透；
vt.過濾；濾除；
filter out 濾除，過濾；（消息等）泄漏；
例句：
1. A filter to remove impurities from the water supply.
從供應水中清除雜質的過濾器。
2. Foreign influence began to filter into the country.
外國勢力開始滲透進這個國家。
3. Charcoal is used to filter water.
木炭是用來過濾水的。
4. It functions as a blood filter out red and white cells.
它就像一個血液過濾器，可以把血液中死掉的白細胞和紅細胞過濾掉。