您要查找的是不是：
- 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会利用水中的沙砾保护自身（我的理解），larva阶段是（昆虫）在水底孵化时不会游泳的时期。
- 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. 水生生物的评价是通过对浮游植物、浮游动物、底栖生物、鱼类种类和数量变化的测定和分析,判定水体的污染和富营养化状况。
- They sent the enemy ship to the bottom of the sea. 他们把敌舰击沉。
- He changed his dwelling recently. 他最近搬了家。
- The child was sitting on the bottom stair. 那孩子正坐在楼梯最下面的一级上。
- Let's not dwell on your past mistakes. 我们不要再细说你过去的错误了。
- I intend to get to the bottom of it. 这件事我打算寻根究底。
- Tears are secreted by an organ under the upper eyelid. 眼泪由上眼睑下面的器官分泌。
- A trailer or dwelling place on wheels. 活动住房用汽车拖拽的住所
- He was always bottom of the class in maths. 他的数学成绩在班上总是垫底。
- He decided to dwell on our island. 他决定到我们的岛上居住。
- The dregs have settled at the bottom of the bottle. 渣滓都沉到瓶底了。
- Language is often spoken of as a living organism. 语言常被当作一种活的有机体来讲。
- The organ play as the bride come down the aisle. 当新娘沿著通道走过来时，风琴演奏了起来。
- I fell right to the bottom of the stairs. 我从楼梯上一直摔到楼梯下面。
- The dwelling place of such a community. 修道院这种团体居住的场所
- The police found a body at the bottom of the lake. 警方在湖底发现了一具尸体。
- The group living in such a dwelling. 印地安部落居住在这种房屋里的一群人
- His bottom waggle in a funny way when he walk. 他走路时臀部扭来扭去，很可笑。
- An ugly, squalid, or depressing dwelling. 蜗居丑陋、肮脏或气氛压抑的居住地
