With the mic placed on a boom stand, position the mic about two feet above the drummer's head, and point it straight down at the bass drum pedal's inner edge.

用吊杆把麦克固定到鼓手头部上方两英尺的高度，并让它向下指向底鼓踏板的内沿位置。

youdao

Are generally installed in the boom when the hook head, sliding to the limit position, then hold the lever.

一般都装在起重臂的头部，当吊钩滑升到极限位置，便托起杠杆。

youdao

Balance weight block installation position is not accurate, will cause the boom and the balance arm balance torque deviation is too large, easily lead to instability of the tower crane.

平衡重块安装位置不准确，会造成起重臂与平衡臂平衡力矩偏差过大，轻易造成塔吊失稳。

youdao

Early in the morning construction crews began lifting the boom to its lofty position above 57th Street.

WSJ: NYC workers replace crane damaged by Sandy

In the latest issue of The Canada Report, published on Jan. 19, contributing editor Gavin Graham recommended a little-known Canadian company as a good way to take a position in the new agriculture boom.

FORBES: Rising food prices offer profit potential

The eyepiece, too, is now attached to a sturdy, flexible boom, which lets you adjust the LCD position just so.

ENGADGET