HSK 7-9
迹象
jìxiàng名
sign; indication; mark; indicator
鸟群突然南飞是降温迹象。
Niǎo qún tū rán nán fēi shì jiàng wēn jì xiàng.
The birds' sudden flight south was a sign of cooling weather.
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Appears across levels (7-9) in the HSK 3.0 word list.