"It's tough at the top," he said. "It's tougher at the bottom," riposted the billionaire.

“身居高位很辛苦，”他说。“在底层更辛苦，”亿万富翁机敏地答道。

《柯林斯英汉双解大词典》

Leave a gap at the top and bottom so air can circulate.

在顶部和底部各留一点空隙，这样空气就可以流通了。

《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》

They have an opening at the bottom for the fire and a place on top to put a pot.

VOA: special.2010.02.01

In fact, the water at the bottom of the waterfall is hotter than the water at the top of the waterfall.

实际上，瀑布底部的水,的确比顶部的水要热。

麻省理工公开课 - 热力学与动力学课程节选

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。

哈佛公开课 - 计算机科学课程节选

When the heart is healthy, the electrical signal passes evenly from bottom to top.

BBC: Computer heart to beat disease

Which strategy works best for bottom and top lines?

FORBES: Coffee over Donuts: How Dunkin Donuts Wins

Net revenues for 2012 were up 5% over 2011, and we expect the company to maintain the momentum it gathered last year with solid bottom and top line growth in the first quarter.

FORBES: American Express Earnings Will Gain On Fatter Fees And Foreign Growth