bottom dweller

同根派生

Many species of caddis larva build a protective covering of fine gravel or debris to protect them in this stage.The larva is a bottom dwelling non-swimming stage of the insect.
很多的caddis larva會(huì)利用水中的沙礫保護(hù)自身（我的理解），larva階段是（昆蟲(chóng)）在水底孵化時(shí)不會(huì)游泳的時(shí)期。
The water pollution and eutrophication were judged by the assessment of hydrobiology with the species and quantity measure and analysis of phytoplankton,zooplankton,bottom dwelling biology and fish.
水生生物的評(píng)價(jià)是通過(guò)對(duì)浮游植物、浮游動(dòng)物、底棲生物、魚(yú)類種類和數(shù)量變化的測(cè)定和分析,判定水體的污染和富營(yíng)養(yǎng)化狀況。
They sent the enemy ship to the bottom of the sea.
他們把敵艦擊沉。
Let's not dwell on your past mistakes.
我們不要再細(xì)說(shuō)你過(guò)去的錯(cuò)誤了。
He decided to dwell on our island.
他決定到我們的島上居住。