A major invention was the adjustable strut that could precisely set the depth of the plow by altering the distance of the blade and the beam.

一个重大的发明是可调节的支柱，通过改变刀板与横梁的距离来精确地设置犁的深度。

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This would allow it to adjust the intensity of the laser beam to account for the target's distance and atmospheric conditions, Mr Hore said.

一旦这种武器顺利上市，它会与英国现有的瞄准系统相结合，从而可以根据目标的距离和气象条件来调节激光束的强度。

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A laser beam like the one pictured up top combines short and long pulses of light to identify individual molecules with a high degree of precision from a safe distance.

一道激光射线由或短或长的光脉冲组合而成，从而能在一个安全的距离高精度地辨别单个的分子。

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Designing them to light up an entire room or shine a beam over a long distance is far more technically challenging and requires higher production costs.

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The same approach has been used in ground-based experiments to beam one kilowatt of power over a distance of several kilometres, notes Peter Fisher, a physicist at the Massachusetts Institute of Technology.

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Commercially obtained laser pointers project just a tiny beam, but its diameter grows much bigger as the distance increases and can result in temporarily blindness if shone in someone's eyes.

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