Detritus is the leftover bits after something has been broken, worn, or used up — scraps, fragments, the mess that remains. After a storm you might see detritus along the road: twigs, plastic, torn paper.

Detritus is the leftover bitsDetritus是剩下的碎片， after something has been broken, worn, or used up東西被打破、磨損、或用壞之後留下的—— scraps, fragments, the mess that remains碎屑、殘塊、殘留下來的髒東西 After a storm you might see detritus along the road暴風雨過後，你可能會在路邊看到detritus： twigs, plastic, torn paper樹枝、塑膠、破紙

Scientists also use it for dead bits of plants and animals that settle on soil or the bottom of a pond.

Scientists also use it for dead bits of plants and animals that settle on soil or the bottom of a pond科學家也用這個字指沉積在土壤或池塘底部的動植物殘骸

Though actually, in ordinary talk it is a slightly fancy stand-in for rubbish or debris. Debris often feels like a sudden wreck; detritus feels like what is left after wearing away, which fits the old idea of rubbing off.

Though actually不過其實， in ordinary talk it is a slightly fancy stand-in for rubbish or debris在日常說法裡，這是rubbish（垃圾）或debris（碎片）比較講究的替代說法 Debris often feels like a sudden wreckDebris給人的感覺常常是突然損毀； detritus feels like what is left after wearing awaydetritus給人的感覺則是慢慢磨損之後剩下的東西， which fits the old idea of rubbing off這也符合這個字原本「磨掉」的意思

It is usually treated as a mass: detritus, not “a detritus” and not often “detrituses”.

It is usually treated as a mass這個字通常當不可數名詞用： detritus, not "a detritus" and not often "detrituses"只說detritus，不太會說「a detritus」或「detrituses」