cased bottom off 箱底掉
fill off bottom 井底填砂
off bottom 离开井底
buoyant off-bottom tow method 离海底浮拖铺管法
bottom casing pack off 底部套管封隔器
All you need is a little saucer and a 2-liter plastic beverage bottle. Cut the bottom off the bottle, and put this over the plant in the saucer. Water with purified water.
你只需要一个水盘以及2公升的塑胶饮料杯,把底部剪掉,然后罩住植物,植物放在装有纯水的水盘中。
Then Houston, the control centre on the earth, called up and told me to use the tape to tape the bottom of the handrail and pull it off the telescope.
然后休斯顿,地球上的控制中心,打电话给我,让我用胶带把扶手的底部粘上,然后把它从望远镜上拉下来。
The bottom line is that you need to study, eat a good meal, sleep well on the eve of the test, and believe that your efforts will pay off.
底线是你需要在考试前夕学习,吃好饭,睡好觉,并相信你的努力会得到回报。
They want to be sure that he is not dealing off the bottom of the stack of cards.
VOA: special.2009.11.22
We just go through the list top to bottom, left to right, and cross names off as we go.
我们会从上到下,从左到右看那个问题清单,如果解决了就把名字擦掉。
STUDENT: -- want to be off the bottom branch.
学生:脱离最底层的分支。
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