1、expression

表达;表述

Laughter is one of the most infectious expressions of emotion.

笑是最具感染力的情感表达方式之一。

From Cairo came expressions of regret at the attack.

开罗对此次攻击表示遗憾。

表情;神情

The civil servant's expression, however, did not change, not so much as by a flicker.

然而，那位公务员的表情还是那样，丝毫没变。

Levin sat there, an expression of sadness on his face.

莱文坐在那里，神情悲伤。

（数学中的）表达式

This forms the basis for our mathematical expression for the electric field.

这是电场数学表达式的基础。

2、sustain

使持续;保持

But he has sustained his fierce social conscience from young adulthood through old age.

而他从青年时期一直到老年都始终保持着强烈的社会良知。

The parameters within which life can be sustained on Earth are extraordinarily narrow.

地球上生命可以存活下来的地域范围是非常狭小的。

经受;遭受;蒙受

Every aircraft in there has sustained some damage.

那里的每架飞机都受到了一些损坏。

A seventeen-year-old tourist died late last night of injuries sustained in yesterday's bomb blast.

一位 17 岁的游客在昨天的炸弹爆炸中受伤并于当天深夜身亡。