Therefore, a begging nestling that secures food at the expense of its siblings might actually leave behind fewer copies of its genes overall than it might otherwise.

因此，一只以其兄弟姐妹为代价来获取食物的乞食雏鸟实际上可能会比其它雏鸟留下更少的基因副本。

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The Roosevelt Administration believed that rebuilding the nation's soil was in the national interest and was not simply a plan to help farmers at the expense of other citizens.

罗斯福政府认为，恢复国有土地是符合国家利益的，也不只是一个牺牲其他公民的利益来帮助农民的计划。

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People do it at the expense of everything that was a constant in their lives.

人们这样做的代价是牺牲生活中所有一尘不变的东西。

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So, here was a royal tomb closed forever and yet built at a fantastic expense and enormous kind of labor.

由此可见,这里曾是一个以惊人的财富,和巨大的劳动力建成的封存的皇家墓穴

耶鲁公开课 - 古希腊历史简介课程节选

This thing's nice because rather than do "if" and "and and" or "or or" and all of this, you can instead enumerate things a little more cleanly, albeit apparently at the expense of more white space.

这个东西是不错的，因为它不用“if“和“and，and“,或者“or，or“所有的这些，你可以用枚举来更清楚地表达它，虽然表面上它用了更多的空格。

哈佛公开课 - 计算机科学课程节选

Regulations were gutted for the sake of a quick profit at the expense of a healthy market.

NPR: Obama's Address To Congress

The current condition of these meandering Mets is largely the aftereffect of blindly chasing a championship in the late 2000s at the expense of a thinning farm system.

WSJ: Married to the Mets: Wright waiting for young help

Gavin Rae tripped Arteta 30 yards in front of goal and Ricksen forced a good save out of Julian Speroni at the expense of a corner.

BBC: Rangers demolish Dundee