查询词典 difficult to

But with so many problems besetting the world, from war to pollution and injustice, I find it difficult to keep smiling .

但是，有这么多问题——战争、污染、不公正等等困扰着整个世界，我觉得很难令人乐观。

It is very difficult to be a profitable sports bettor without the ability to shop for the best line.

很难成为有利可图的体育投注店无能力的最佳路线。

However, if the bevel angle of the gear approaches to 90 °, it is difficult to machine it.

但是，如果直齿锥齿轮的锥角接近90度，利用伞齿刨加工是非常困难的。

Too high to be reached; beyond one's reach; difficult to reach; high up and beyond grasp; lofty and out of reach; so tall that it is out of reach; unattainable

他的脑子里总是想一些高不可攀的目标。

A comprehensive research has made in the application of elliptic curve based bilinear mapping in the group signature, security of bilinear mapping is established on the GAP group. Because the DDH problem is easy to solve in GAP, this fact results it is very difficult to design a bilinear mapping based group signature scheme which can satisfy anonymity and the tractability.

对基于椭圆曲线的双线性映射在群签名中的应用进行了深入的研究，由于双线性映射的安全性建立在GAP群上，而在GAP群上的DDH问题是容易求解的，这样导致在基于双线性映射的群签名方案设计中很难同时兼顾群签名的匿名性和可跟踪性。

This unlikely trio--a writer, a founding father of molecular biogeochemistry, and a leading petroleum organic geochemist--have created a work that is as difficult to characterize as it is fun to read.

主要作者是Susan Gaines，充满了对化石分子的热情和广泛的知识，Geoffrey Eglinton和Juegen Rullkoetter是其他的两个主要作者，被认为是分子生物地球化学的奠基者，并且领导了石油有机地球化学的发展并且使得所有的这些科学变成了浅显易懂的趣事。

Children with brain may be pregnant mother on the damage may also be encountered after birth trauma, because of their ability to express incomplete, the damage was difficult to find parents.

患儿脑部可能在母孕时就遭受损害，也可能出生后遇到外伤，由于他们表达能力不完整，这些损害很难被家长发现。

Fortunately, the "mercury" of the operation very well, PSP slider in the beginning of the operation although a bit difficult to control when playing; but most of the time, you can easily use this kind of operation to tilt the platform of the maze.

庆幸的是，"水银"的操作十分出色，PSP滑杆的操作虽然在初玩时有点难以控制；但是在大部分时间里，你可以轻松的利用这样的操作来倾斜整个迷宫平台。

Blood poisoning is dangerous because once bacteria get into the bloodstream, it is difficult to prevent them flowing to the bodys vital organs.

血液中毒的危险，因为一旦细菌进入血液中，是很困难的，以防止他们流向该body s重要器官。

In people-to-people relations and the process of doing things, it is difficult to put things bluntly well.

在人与人的关系以及做事情的过程中，我们很难直截了当就把事情做好。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。