一个是正态分布下降是依据中间部分转角处到平面距离的负指数。
One is that a normal distribution falls off according to the negative exponential of the square of the distance from the mean.
现在它距离海平面只有区区70米，岛上居民已经试着给将要出现的小岛起名字了。
It is now just 70 metres from the surface and islanders are already trying to come up with a name for the new island.
好的我开始了，点A距离这个平面,高度差，现在运用,机械能守恒定理。
Okay, I start off, point A is at a distance h h above this level, and so I apply now the conservation of mechanical energy.
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