half angle [机] 半角
- Now move left half way to the side, and angle at45% towards the left rim.
现在把麦克向左(人认为这里指的是以鼓手的位置作标准)动到距左腔壁1/直径的位置,并且成45度指向左边的鼓圈。 - As the glider turns through half a rotation, its airspeed is slowed down and the angle of attack increased as the pilot starts to pendulum underneath.
当飞行伞经过半圈迴转,它的空速慢下来而攻角加大;同时飞行员开始向下摆盪。 - Screen angle indicator: A protractor with many co-centre circles. When placed over a half-tone film or print, indicates by a halo, the screen angle of the
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