... ratchet catch 停止挡 ratchet motion 棘瓜装置 ratchet wheel 棘轮 ...
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They are supporting actors rather than lead players, and although they may ratchet the action forward, they should not be the engines of motion.
它们是配角，而不是主角。虽然它们有助于行动的推进，但不应该成为前进的发动机。
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