forewarning
前兆
Fore·warn v. t. [imp. & p. p. Forewarned p. pr. & vb. n. Forewarning.] To warn beforehand; to give previous warning, admonition, information, or notice to; to caution in advance.
We were forewarned of your coming. --Shak.
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forewarning
n : an early warning about a future event [syn: premonition]