The vertical distance from crest to spill plane is the closure of the trap.

从圈闭顶部到溢出面的垂直距离称为圈闭的幅度。

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I chose these values so that the horizontal distance is 3 and the vertical distance is 4;

我选择这些数值，水平的距离就是3，竖直距离就是4；

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Dropdown: the minimal dropdown is the vertical distance which is from the head to the neckline.

跌幅：从头到颈线的垂直距离为最小跌幅。

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The study recommended a minimum vertical separation distance between fracking wells and water supplies of 600m (2, 000ft).

BBC: Fracking: Untangling fact from fiction

"Suddenly, we saw in the distance a strong and intense flash of white light, which followed a descending and vertical trajectory and which broke up in six seconds, " the captain wrote.

CNN: Brazilian air force says debris was not from Air France crash