So, that's the big result.

这就是最后的结果
It'll slide down the hill with an acceleration g · sin(θ).

它会顺着斜面以 g·sin(θ) 的加速度滑下来
This is a good way to measure g, by the way,

顺便说一下这是测量 g 的好方法
because if you drop something,

因为你扔东西的话
it falls too fast for you to time it.

它会落得太快让你没法计时
But if you let it go down an incline,

但是如果让它从斜面上滑下来
by making θ very small

让 θ 非常小
so sin(θ) is very small and the grading is very low,

那么 sin(θ) 就非常小坡度就非常小
the body can accelerate with a much slower acceleration downhill,

物体就会以小得多的加速度下滑
because it's reduced by this factor, sin(θ).

因为加速度是按照这个因子减小的 sin(θ)
Okay, here's another thing I should tell you right now.

我还有一件事现在要告诉你们
Most of us, when we become professionals,

大多数人我说的是专业人士