枯燥的英文：
uninteresting
monotonous

参考例句：

the dusty precepts of a bygone era.
过去时代的枯燥戒律。

As dry as a bone
十分枯燥，干透了

The housework agency hired him to do scut work.
那家家政公司雇他做些枯燥的力气活。

A dry-as-dust-- A matter-of-fact man who talks astronomy on a moonlit night.
令人烦厌的学究——好比在明月当空之际大谈天文的枯燥鬼。

sterile pleasures.
枯燥的娱乐。

Our maths classes are pretty deadly.
我们的数学课非常枯燥。

Uninteresting or boring thing
乏味的或枯燥的事物

He made a very boring after-dinner speech.
他在宴会后的讲话很枯燥.

(of life,a job,etc)boring and unimportant
(指生活、工作等)枯燥而不重要的

Not animated or energetic;dull.
无生气的没有活力或精力的;枯燥的

uninteresting是什么意思：
a. 无兴趣的，无趣味的，无聊的

Many people complain that their jobs are uninteresting and stressful.
许多人抱怨他们的工作既无趣又产生压力。

Tedious,monotonous,or uninteresting work of any kind.
平庸的作品冗长，单调，令人感到乏味的作品

Their conversation was banal full of uninteresting remarks, such as
他们的谈话还是老一套，充斥着无趣的话题，诸如“天气不错”以及“今天车流缓慢”等。

No one smiled a greeting and they appeared uninterested in Soapy's carrier
没有人微笑表示欢迎，对装着索皮的提箱也不感兴趣

He wove uninteresting tale from a few facts in a blistery book.
他将历史书中的一些事实编成一个有趣的故事。

monotonous是什么意思：
adj. 单调的；无变化的

terribly monotonous
可怕地单调

The days connecting these seasons are monotonous.
这两个季节之间的日子是非常单调的。

It was like my own marsh country, flat and monotonous.
这地方很像我故乡的沼地，景色单调，索然无趣。

The windshield wipers swished back and forth monotonously.
挡风玻璃上的雨刷单调地来回摆动,发出飕飕声。

She has a very monotonous voice; she should have it modulated.
她的声音很单调，应该加以调整。