介绍:
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A tall grandfather clock has a long pendulum that swings back and forth in a steady rhythm. With every swings, wheels inside the clock slowly turn, moving the hands round the face. Winding the clock with a key stops it slowing down.
1.grandfather clock:有摆的落地大座钟
2.pendulum:摆，钟摆
3.swings:摇摆，摆动，摆程
4.wind:wind sth (up)给（钟表等）上发条
