HSK 7-9
波动
bōdòng动
to undulate; to fluctuate; wave motion; rise and fall
近期市场价格出现明显波动。
Jìn qī shì chǎng jià gé chū xiàn míng xiǎn bō dòng.
Market prices have fluctuated noticeably recently.
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Appears across levels (7-9) in the HSK 3.0 word list.