名詞 pendulum:

1. an apparatus consisting of an object mounted so that it swings freely under the influence of gravity

1. A pendulum oscillates.
   擺錘能擺動。
2. The pendulum of the clock in my room is a bear.
   我房間的鐘擺是小熊形狀的。

pen.du.lum

n.（名詞）
A body suspended from a fixed support so that it swings freely back and forth under the influence of gravity, commonly used to regulate various devices, especially clocks.Also called simple pendulum
擺：在一固定點(diǎn)懸垂的可在重力影響下自由來回?cái)[動的擺體，通常用于調(diào)校鐘等各種儀器也作 simple pendulum
Something that swings back and forth from one course, opinion, or condition to another:
沿某一路線、想法或事態(tài)來回?cái)[動的東西：
例句：
the pendulum of public opinion.
民意變化不定

來源：
New Latin
現(xiàn)代拉丁語
probably from Italian pendolo [pendulous, pendulum]
可能源自 意大利語 pendolo [松垂的，鐘擺]
from Latin pendulus [hanging] * see pendulous
源自 拉丁語 pendulus [垂懸的] *參見 pendulous