These workers are fed up with being at the bottom of the pile when it comes to pay.

这些工人受够了收入水平处于底层的苦恼。

《柯林斯英汉双解大词典》

We started from the bottom and we had to work our way up to the top.

我们从最底层做起，必须奋斗到最高层。

《柯林斯英汉双解大词典》

You have to be prepared to start at the bottom and work your way up.

你得准备好从最基层干起，努力向上。

《牛津词典》

He said, "We continue to expect economic activity to bottom out, then to turn up later this year."

VOA: special.2009.05.08

I'm going to begin at the bottom of 73: If you have your book, go ahead and open it up.

我将从73页最下面开始读：,如果你带了书，那么就打开书翻到那页。

耶鲁公开课 - 1945年后的美国小说课程节选

So, if we're talking about five different orbitals and we're talking about a ground state atom, we know that we just need to start at the bottom and work our way out up.

因此，如果我们要讨论的是,五个不同的轨道且是属于一个基态原子的话，我们知道，我们只需要从最低的轨道,开始一个一个往上找。

麻省理工公开课 - 化学原理课程节选

The most common batteries are made up of negative and positive halves (the anode and the cathode), a material to separate them, and "current collector" layers at top and bottom to gather up the electric charges moving through.

BBC: 'Paint-on' batteries demonstrated

As the program developed, modules were continuously adjusted and the approach to implementing projects had to be modified to a bottom-up approach from top-to-bottom previously.

WSJ: Microloans Target Shopkeepers

Communities and local civil society organizations need to be actively involved in decision-making in order to generate bottom up demand for change and hold governments to account for public investment in water and sanitation.

FORBES: CEO of WaterAid America David Winder Calls For More Public Education On Water Issues