1、underneath

在…下面；在…底下

The device exploded underneath a van.

该装置在一辆货车底下发生了爆炸。

using dogs to locate people trapped underneath collapsed buildings.

利用狗来寻找被困在倒塌的楼房下面的人

在下表面；在底面

Check the actual construction of the chair by looking underneath.

看看椅子的下面，检查一下它的实际构造。

The sand martin is a brown bird with white underneath.

崖沙燕是一种褐羽白腹的鸟。

在内心深处；心底里

He was as violent as Nick underneath.

在内心深处，他和尼克一样暴躁不安。

Underneath, Sofia was deeply committed to her husband.

索菲娅从内心里对丈夫忠贞不贰。

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。