pendulum
US /ˈpen.dʒəl.əm/
UK /ˈpen.dʒəl.əm/
名詞
1.
振り子
a device consisting of a weight on a stick or thread that moves from one side to the other, especially one that forms a part of some types of clocks:
例:
•
The pendulum in the grandfather clock swung back and forth.
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