这些海洋滑翔器没有引擎，取而代之的是通过改变浮力在垂直方向上进行操控，水平方向上依靠一对又短又硬的翅膀滑翔前进。
These sea gliders do not have an engine and instead manoeuvre vertically by changing their buoyancy while relying on a pair of short, stubby wings to glide forwards.
采用这种方法，仅需在垂直于蝗蝻带前进方向很窄的地带上施用该产品即可。
In this method only narrow swathes of the product are applied, perpendicular to the direction of the marching hopper bands.
在真空中，它们都以光速前进；它们都由彼此垂直的电磁矢量构成；它们都可以用光子来量化，等等。
In a vacuum they all travel at the speed of light; they are all composed of electric and magnetic vectors which are perpendicular to each other; they are all quantized as photons, and so on.
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