His hands were clasped behind him like a drill sergeant.
他双手背在身后,像一个教官。
Thus the clock laser's orderly light waves are paced by the atomic metronome - just as a drill sergeant keeps troops in precise cadence.
因此用原子节拍器对其调节使其有序,就好像教官喊节拍一样。
Drill sergeant John Eldridge holds the pin in place and prepares to secure it with a fist.
操练军官约翰·艾尔德里奇徽针放在衣服上合适的位置,并准备用拳头来固定它。
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