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- Application of caving mining technology with bottom under condition of flat dipping mid-thick body and unstable rock caused the most of trench and bottom drift, located in abutment , to be destroyed and low recovery in south area, Xishimen Iron Mine. 摘要在缓倾斜中厚矿体底板岩性不稳固的条件下，采用有底柱崩落法，由于电耙道大多处于空区边部应力集中的部位，致使堑沟及底部结构巷道破坏严重而使回收率极低，采用无底柱崩落卸压则可有效解决上述难题。
- They sent the enemy ship to the bottom of the sea. 他们把敌舰击沉。
- The child was sitting on the bottom stair. 那孩子正坐在楼梯最下面的一级上。
- I didn't get the drift of his argument. 我没有听懂他论点的要领。
- I intend to get to the bottom of it. 这件事我打算寻根究底。
- I can't quite catch the drift of his speech. 我不甚了解他的演讲的大意。
- He was always bottom of the class in maths. 他的数学成绩在班上总是垫底。
- There is a drift of farmers to the cities. 农民流向城市。
- The dregs have settled at the bottom of the bottle. 渣滓都沉到瓶底了。
- I fell right to the bottom of the stairs. 我从楼梯上一直摔到楼梯下面。
- The police found a body at the bottom of the lake. 警方在湖底发现了一具尸体。
- His bottom waggle in a funny way when he walk. 他走路时臀部扭来扭去，很可笑。
- The bottom of the boat was rusty. 船底生锈了。
- There is a pair of scissors in the bottom drawer. 最底下的抽屉里有把剪刀。
- We switched off the motor and started to drift (along). 我们关闭发动机开始滑行。
- Prices have reached rock bottom. 价格已经到了最低点。
- Every indication show market get near bottom now. 所有迹象表明，目前市场价格已跌落低谷。
- She knocked the bottom out of our argument. 她把我们的论点驳得体无完肤。
- Her dress flared out towards the bottom. 她的裙子在下摆处呈喇叭状展开。
- Please dust all the books on the bottom shelf. 请把底层书架上的书都掸一掸。
