It can't pass this MOSFET, so the LED will be off.

它不能通过这个 MOSFET，因此 LED 将熄灭。

This is just an N-channel MOSFET to see what these things actually do.

这只是一个 N 沟道 MOSFET，看看这些东西实际上做了什么。

So the MOSFET doesn't really do what we expect anymore.

所以 MOSFET 不再真正发挥我们的预期作用。

Then there is a certain threshold in this MOSFET where it starts to open up and starts to conduct current to turn on the LED.

然后在这个 MOSFET 中有一个特定的阈值，它开始打开并开始传导电流以打开 LED。

So the setup time, for example, is you need some time to chain, so to charge up all the gates of the MOSFET in such a D flip-flop or wherever else.

因此，例如，设置时间是您需要一些时间来链接，以便为此类 D 触发器或其他任何地方的 MOSFET 的所有栅极充电。

And a higher current means that we can put more charges into the gate capacitance and thereby turn the MOSFET on faster or discharge it faster and turn it off faster.

更高的电流意味着我们可以将更多的电荷放入栅极电容，从而更快地打开 MOSFET 或更快地放电并更快地关闭它。