隨時(súi shí)
At any time
例:我這幾天都在家,你可以隨時過來找我。
(wǒ zhè jǐ tiān dōu zài jiā, nǐ kě yǐ súi shí guò lái zhǎo wǒ)
I will be at home these days, and you can come over at any time.
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