When did it become accepted wisdom that students should be able to name the 13th president of the United States but be utterly overwhelmed by a broken bike Chain?

从何时起我们开始接受学生应该能够说出美国第十三任总统是谁，但对自行链条断了却迷惑不解。

Hey Jane. Is this your new bike?

嘿，简。这是你的新自行吗？

Subjects have to pedal on the exercise bike and keep their heart rate up.

受试者必须健身单并保持心率。

And it uses a bicycle drivetrain, very similar to what you have on your bike, to transfer power from these levers to the wheels.”

这种轮椅使用自行传动系统，很像自行，将力量从控制杆传送到轮子。”

Galloping fast on a galloping horse, that's faster than on my bike, of course.

骑快马奔腾，当比我骑自行快。

11. What is the man's concern about selling bikes abroad?

11。关于把自行销往国外，这位男士的顾虑是什么？

An hour of cycling really intensely on exercise bikes to burn off about two doughnuts.

在健身脚卖力地踩一小时才能消耗掉大约两个甜甜圈的热量。

Ride indoors on a stationary bike or go outside and enjoy the scenery.

在室内踩健身脚或骑脚到室外去欣赏一下风景。

Most students come to school by bike and they like riding bikes.

大部分学生骑自行到学校，他们喜欢骑自行。

Do you ride a bike on Mondays?

你星期一骑自行吗？

We'll replace the defectively bikes with new ones.

我们有毛病的自行都换成新的。

But Uncle Steve taught me how to ride a bike!

但是Steve伯伯教我骑的单！

My bike is nice. Mike's kite is high.

我的自行很好看。麦克的风筝很高。

I'm going to invent a flying bike!

我打算发明一辆会飞的自行！

And we borrowed a bike for you.

而且我们给你买了一辆自行。

It comes from the idea of when you have a car tire or a bike tire and you pump it up with air, and of course the tire gets bigger.

它来源于这个情景——当你有一个汽轮胎或自行轮胎，你给它打气，当轮胎就会变大。

You have an extra helmet on that bike, right?

你还有一个头盔 是吧?

For example, she was over the moon with her new bike.

例如，她骑着她的新自行，喜出望外。

When we drift off, the areas of our brain that control motor function are inactivated in favor of those that control our sleep cycles, which is why you can dream about riding your bike without actually moving your feet.

当我们昏昏欲睡时，我们大脑中控制运动功能的区域会没有活力、那些控制我们睡眠周期的区域取而代之发挥作用。这就是为什么即使没有真的动你的退，你仍会梦到骑自行。

At that moment the telephone rang and Aunt Petunia went to answer it while Harry and Uncle Vernon watched Dudley unwrap the racing bike, a cine-camera, a remote control aeroplane, sixteen new computer games, and a video recorder.

这时电话铃响了，佩妮姨妈跑去接电话。哈利和弗农姨父看着达力拆包，一辆赛、一台摄像机、一架遥控飞机、十六盘新出的电脑游戏光盘和一台磁带录像机。