If it were not for friction, you could not walk.

These reforms were in the best interests of local government.

这些改革对地方政府最有利。

They were promoted to the First Division last season.

上个赛季他们晋升为甲级队。

What in the world did they think they were doing?

他们到底认为自己在做什么？

They were surprised to find that he'd already left.

他们惊奇地发现他已经走了。

There was so much traffic that we were an hour late.

路上车辆那么多，我们迟到了一个小时。

When they set out they were well prepared.

他们出发时有很充分的准备。

At the end of the day we were £ 20 down.

一天下来我们少了20英镑。

It's time the kids were in bed.

孩子们该睡觉了。

Where were they made?

这些是在哪里制造的？

Everywhere people were going about their daily business.

无论哪里人们都在忙着干日常工作。

They've been best friends since they were children.

他们从孩提时起就是最要好的朋友。

There were low banks of earth between the rice fields.

稻田之间有低矮的田埂。

There were 200 people present at the meeting.

有200人出席会议。

There were 50 people there, at the very most.

那儿最多只有50个人。

COMAC said in a separate statement that it had started assembling the first ARJ21 for delivery to customers and that it was now in the process of installing aviation systems on the aircraft.

中国商飞在另一份声明中表示，已开始组装首架用于交付客户的arj21，目前正在为飞机安装航空系统。

The COMAC launched a design and research center and a customer service center earlier this year in Shanghai.

今年早些时候，中国商飞在上海成立一个设计和研究中心以及一个客服中心。

The challenge for Comac will be to integrate the thousands of components and systems in an aircraft certified as safe by both the Civil Aviation Administration of China and the US Federal Aviation Administration.

中国商飞面临的挑战，将是把数百种部件和系统整合到一种飞机上，然后使其获得中国民航总局（CAAC）和美国联邦航空局（FAA）的安全认证。

Comac enjoys the support of a cash-rich state backer-a factor that was essential to Airbus's emergence as Boeing's main rival.

中国商飞得到充足的政府机构的支持——而这一因素是空客成长为波音的主要对手关键因素。

He added that Ryanair would look to buy both COMAC jets and an all-new Boeing aircraft to encourage competition between the two companies.

他补充表示，瑞安航空希望能同时购买中国商飞的客机和波音的全新机型，以促进两家公司的竞争。

Boeing and COMAC have been collaborating since 2012 to support the growth of China's commercial aviation industry.

波音和中国商飞为支持中国商业航空事业的发展从2012年开始合作。