Culch
n. 貝殼屑, 廢物
??? 情景例句
Smokers pollute the air.
吸煙污染空氣。
That cat judged the distance before he leapt across the ditch.
貓在越過溝渠以前便判斷好其距離了。
and it is only in the seas and rivers, and sometimes lakes, where mud and sit have been continuously deposited,
所以只有在泥沙不停淤積的海洋和江河里，有時在湖泊里，