1、expense

花费;费用;开支

He's bought a specially big TV at vast expense so that everyone can see properly.

他花大价钱买了一台特别大的电视机，这样每个人都能看清楚。

To avoid extra expense and mess later on, try to decide on fittings before the plastering's finished.

为避免将来出现额外的开支和不必要的麻烦，尽量在抹灰完工之前把固定设施确定下来。

以牺牲…的利益为代价

But skeptics worry that costs may be trimmed at the expense of the patient.

但是持怀疑态度的人担心费用的削减会以牺牲病人的利益为代价。

According to this study, women have made notable gains at the expense of men.

根据这项研究，女性以牺牲男性的利益为代价而获得了显著的收益。

花（大笔）钱做

Why go to the expense of buying an electric saw when you can hire one?

既然可以租电锯，为什么要花大价钱买一个呢？

It was said that he went to great expense to install a lift in the building.

据说他花费巨资在大楼里安装了一台电梯。

2、protect

保护；防护

So, what can women do to protect themselves from heart disease?

那么，女性怎样做才能使自己不得心脏病呢？

A long thin wool coat and a purple headscarf protected her against the wind.

一件薄薄的羊毛长外套和一条紫色的头巾为她挡了风。

（保险单）为…提供保险

Many manufacturers have policies to protect themselves against blackmailers.

许多厂家都购买了保险，以防遭到敲诈。