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It must be difficult to drive a bus since it has such a big steering wheel.

驾驶公共汽车一定很难，因为它的方向盘那么大。

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。

He says: It's not necessarily more difficult for children to be bilingual ...

他说：让孩子会两种语言没有很大的困难。。。

After many years of tireless work of the authority of scientists, and finally succeeded in developing a new generation biological drugs for psoriasis, special effects,"Bilker Silver peptide," and completely rewritten the history of psoriasis difficult to cure.

经过科学家的不懈努力权力多年，终于研制的新一代治疗牛皮癣的生物药物，特殊效果，"比尔克银肽"，彻底改写了牛皮癣的历史难以治愈成功。

Bill broker"s system of our country has a lot of questions, mainly: Bill broker system law, regulation, management organization and functionare imperfect in construction; The current operation mode is backward, is difficult to meet the development of network economy and securities market; Besides, bill broker" s incentive mechanism, management system of inside and risk management are serious defect and insufficient.

我国证券经纪人制度建设目前存在许多问题，主要有：证券经纪人制度法律、法规和管理机构、职能建设不健全：现行运作模式落后，难以适应网络经济和证券市场的发展；同时，在证券经纪人激励机制、内部管理制度及风险管理方面均存在严重的缺陷和不足。

Mr Toyoda's task could be made more difficult after the US committee's subpoena of documents held by Dimitrios Biller, a former Toyota lawyer who handled consumer complaints, as part of its investigation into the recall of more than 8.5m Toyota vehicles.

丰田章男的任务可能变得更加棘手，因为美国国会的这个委员会已向负责处理消费者投诉的丰田前律师迪米特斯。比勒发出传票，命令其交出自己所持的文件，此举是该委员会对丰田召回逾850万辆汽车一事调查的一部分。

A:it's very difficult to save enough money.i wish i could be a billionaire.

很难攒下足够的钱。我真希望我是个亿万富翁啊。

It's very difficult to save enough money.i wish i could be a billionaire.

很难攒下足够的钱。我真希望我是个亿万富翁啊。

It is difficult to choose the threshold value when the histogram of images is not evidently bimodal.

图像的直方图双峰不明显时，选择分割阈值就很困难。

It would, however, be very tedious and difficult to write all information in binary code .

把所有的信息都翻译成二进制码是十分枯燥和困难的。

Hanna: That's over now, isn't it?

都结束了，对吗

You must be ill. You look so pale.

你一定是病了，你的脸色苍白。