We want to make sure our brakes work before we find ourselves on the top of a hill about to go down.

我们得确保自己在即将下山的山顶上之前，刹车能够正常工作。

Your brakes work on hydraulic power.

您的制动器依靠液压动力工作。

We wanna make sure that our brakes work before we find ourselves on the top of the heel about to go down.

我们要在坐上自行车准备往下骑行之前确保刹车正常工作。

Fantastic stuff: there's an exhaust gaskin, as I believe it's called, the most magnificent battery, and it'll be a great opportunity to find out how brakes work.

真是神奇的东西，有一个排气装置，就像我相信它说的，最华丽的电池，这是一个伟大的机会来研究刹车是怎样工作的。

B is for brakes. We want to make sure our brakes work before we find ourselves on the top of a hill about to go down. And C is for chain.

" B" 代表刹车。在发现自己处于快要下坡的山顶之前，我们要确保刹车能够正常工作。" C" 代表车链子。"