1.Gao San's mathematics touch bottom a boy ask: Teacher draw to have no pencil, lend 1 to still keep using a fountain - pen?
高三数学摸底一男生问：老师，画图没有铅笔，是借一支还是用钢笔？
2.Thorough due diligence and rigorous downside-scenario planning are also critical in a market where some sectors have yet to touch bottom.
充分调查研究和严谨的风险规划在一个某些区域还未探底的市场也十分重要。
3.When Rodger finally felt his feet touch bottom, he was gasping.
当罗杰的脚终于触碰到水底时，他已气喘嘘嘘了。
4.At the same time, the current caught him, and he could no longer touch bottom.
就在这时候，海流也赶了上来，他已经完全够不着海底了。
5.Unfortunately, the water there is far too deep for even the tallest windmills (see picture) to touch bottom.
可惜是海的深度太深，即使是最高的风电机（见图）也到不了海的底部。
6.The water isn't deep here, I can just touch bottom.
这里的水不深，我触得到底。
7.we should act promptly, and we shouldn't wait till we touch bottom.
我们必须赶紧行动吧！别等到情况糟得无以复加才行动。