And that's just pushing the accelerator pedal down on this bus.

这只是把这辆巴士油门踩下去。

Imagine you enter a car with no steering wheel, no brake or accelerator pedals.

想一下，你进入了一辆没有方向、刹车和油门汽车。

No. If you step on the accelerator pedal you can flood the carburetor and your car will never start.

不要。踩油门向汽化器里灌油，这样你汽车就再也启动不了了。

It keeps the accelerator pedal from even being installed.

它甚至让油门踏板都无法安装。

Or they can occur in proto-oncogenes, which normally code for proteins that promote the cell cycle - so they're the cell cycle's accelerator pedal.

基因突变也可以发生在原癌基因；原癌基因功能是编码促进细胞周期运转蛋白质，所以它算是细胞周期“油门”。