难于

The imperfection of language makes some ideas hard to express.

语言功能的不完善使一些思想难于表达.

The student was out of his depth in discussion on the Middle Ages.

那个学生对关于中世纪的讨论感到难于理解.

It is above comprehension.

那是难于理解的.

His mature compositions are generally considered the more cerebral and crabbed.

他成熟的作品一般被认为是触动理智的和难于理解的.

His hatred is implacable.

他的仇恨难于平息.

Finding a vaccine for Plasmodium has been an elusive goal.

寻找防治疟原虫的疫苗,一直是个难于达到的目标.

It comes hard for me to accept your views.

我感到非常难于接受你的观点.

They are sometimes difficult to differentiate from aromatic or olefinic absorptions.

有时它们就难于和芳香族或烯烃的吸收峰相互区别.

I saw that his delicacy was avoiding the right word.

我看出他有点难于措词,因为他不想把那个词儿明说出来.

It is difficult to rein a fiery horse.

脾气暴躁的烈马是难于驾驭的。

It's disgraceful to say so.

难于启齿.

Conversely, test made in full-scale boilers are usually difficult to reconcile.

与此相反, 在工业规模的锅炉内所做的试验,也难于互相一致.

They rate librarianship skills higher than subject knowledge in on-line searching.

他们认为图书馆技术要比联机检索主题知识更难于掌握.

The horse got completely out of hand.

那匹马已完全难于控制了.

Rarely can permanent control be achieved by a single application of spray.

使用一次药剂防治难于持久地控制害虫.