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HSK levels

    密切

    mìqiè

    1. close; intimate; to strengthen (ties, cooperation etc)
    2. closely; intently; carefully
    3. (math.) to osculate

    我们需要密切关注这个项目的进展。 Wǒmen xūyào mìqiè guānzhù zhège xiàngmù de jìnzhǎn.