1、touch down

降落;着陆 When an aircraft touches down, it lands

Spacecraft Columbia touched down yesterday...

“哥伦比亚”号宇宙飞船昨天着陆。

The first large contingent of troops touches down on American soil today.

第一批分遣大部队今天在美国着陆。

2、erupt

（火山）喷发，爆发

The volcano erupted in 1980, devastating a large area of Washington state...

那座火山在1980年喷发，摧毁了华盛顿州大片地区。

（冲突、战斗等）突然发生，爆发，突然加剧

Heavy fighting erupted there today after a two-day ceasefire...

在停火两天后，今天那里爆发了激烈的战斗。

（某地）爆发动乱;（人群）突然暴怒，发生骚乱

In Los Angeles, the neighborhood known as Watts erupted into riots...

在洛杉矶，一个叫做沃茨的街区爆发了动乱。

3、permanent

a、形容词永久的；永恒的

Heavy drinking can cause permanent damage to the brain.

酗酒能造成永久性大脑损伤。

b、不断出现的，一直存在的

a permanent state of tension.

长久以来的紧张局势

They feel under permanent threat...

他们觉得一直处于威胁之下。

c、（员工）终生的,长期的

At the end of the probationary period you will become a permanent employee.

试用期结束后,你将成为长期雇员。

a permanent job.

固定工作

d、（家庭住址）固定的

York Cottage was as near to a permanent home as the children knew...

在孩子们眼中,约克小屋最像一个安定的家。