Laughter is one of the most infectious expressions of emotion. [+ of]

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。

...the rights of the individual to freedom of expression.

个人的言论自由权

Her concern has now found expression in the new environmental protection act.

现在，她所关注的问题已在新的环境保护法案中得以表达。

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. [+ of]

莱文坐在那里，神情悲伤。

The face is entirely devoid of expression.

脸上完全没有表情。

I don't sing perfectly in tune, but I think I put more expression into my lyrics than a lot of other singers do.

我唱歌不是特别合拍，但我认为我唱得比其他很多歌手都更富感情。

She spoke in a quiet voice but used remarkably coarse expressions.

她说话声音很小，但是用了些特别粗俗的字眼儿。

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

这是电场数学表达式的基础。