There is some melancholy in his mirth.

He could not restrain his temper [ mirth ].

他无法抑制愤怒 [ 欢笑 ].

His mind was boiling with mirth and fear and pride.

快意、恐惧、自豪一齐在心头翻腾.

They giggled with mirth.

他们高兴得咯咯地笑.

Listen to the sorrowful songs, watch at the mirthful films.

听悲伤的歌, 看幸福的戏.

The mirthful ending of the movie delighted all the audience.

这个电影的欢喜结局使观众感到非常高兴.

Mirthful laugh echoed in the big hall.

欢快的笑声在大厅里回响.

As she spoke, her eyes were mirthful, while her lips pouted.

说时, 她眼睛里含笑, 嘴撅着.

Her funny costume caused much mirthful laughter among the guests.

她那滑稽的服装引得客人哄堂大笑.

'Now it's your turn,' he said with a mirthless grin.

“现在轮到你了。”他咧着嘴苦笑道。

Hsinmei quickly added, " Of course, I've no experience, " and laughed a forced, mirthless laugh.

跟着一句又轻又快的话 —— “ 当然我并没有经验, ” 毫无幽默地强笑一声.

Mirthless high malicious laughter.

并不快活的尖声嗤笑.

As she a mirthless smile , her even white teeth were bared as if ready to bite.

她露出她的白牙齿干笑,那整齐的牙齿好像会咬人.

Some laughed again: mirthless but with meaning.

有些人又笑了,不畅快,却别有用意.

His mirthless smile made all of us uncomfortable.

他生硬的笑使我们感到很不舒服.

a mirthless laugh/smile

苦笑

His mouth corners curved in his highly individual, cold, almost mirthless smile.

他嘴角一抿, 露出极为独特的, 几乎是闷闷不乐的淡笑.

We have been fed up with the mirthless routine work all day long.

我们受够了整天沉闷的日常工作.

misbehaviour

行为不端

What caused this anger and mistrust (= lack of trust) ?

这怒气和不信任是怎么来的？

misinterpret

误解