He also had to practice riding a bicycle.

他还得练习骑自行车。

" Wearing loose pants while riding a bicycle is dangerous" .

" 穿着松松垮垮的裤子骑自行车是危险的" 。

It's a mouse, riding a bicycle around a maze.

它是一只老鼠，骑着自行车绕着一个迷宫。

" Shy, " he replied. " I taught him to ride a bicycle" .

" 很怕羞，" 他回答说。 " 我教过他骑自行车。"

He had not ridden a bicycle since he was very young.

他从很小的时候开始就没有骑过自行车。

They are now experiencing new freedoms, such as riding a bicycle.

如今她们正在体验新式自由，比如骑自行车。

Learning to ride a bicycle can open a whole new world to children.

学习骑自行车可以给孩子们打开一个全新的世界。

Right now this is what he is doing, he is riding a bicycle.

这表示了这个男人现在正在做的事情，他正在骑自行车。

Riding a bicycle in public as a woman was unthinkable at the time.

当时，女性在公共场合骑自行车简直异想天开。

There is no possible way a woman could ride a bicycle around the world.

女人不可能能够骑自行车环游世界。

Rachel Varn still remembers how she felt riding a bicycle for the first time.

雷切尔·瓦伦（Rachel Varn）还记得她第一次骑自行车的心情。

Surely you have ridden a bicycle, and perhaps you have run a sewing machine.

你肯定骑过自行车，也许还开过缝纫机。

I remember the day my father tried to teach me how to ride a bicycle.

我记得我爸爸教我骑自行车的那天。

We'll go by train, it's too far to ride a bicycle. And there's no subway.

我们坐火车去，骑车太远了，也没有地铁。

Hello. And to make a call clear, even when you're riding a bicycle down the sidewalk.

你好。还能清晰通话，哪怕是你在人行道上骑自行车的时候。

Or would you consider learning how to ride a bicycle by simply reading a book about how to ride a bicycle?

你认为能会考虑通过简单地阅读一本关于如何骑自行车的书来学习骑自行车吗？

But that wasn't the case when you first started learning how to ride a bicycle, right?

但当你刚开始学习骑自行车时，情况不是这样的，对吧？

Or, it wasn't exactly a walk in the park, but eventually, I learned to ride a bicycle.

或者，这可不是在公园里散步那么简单，但最终，我学会了骑自行车。

Ride in a car with other people. Ride a bicycle, walk, or take the public bus or train.

和他人同乘一辆车。或是骑自行车、走路、乘坐公交和火车出行。

Another group rode a bicycle for about 50 minutes, three times a week. A third group did nothing.

另外一组每周三次骑自行车，每次50分钟。第三组什么运动都不做。