About
HSK levels

    一下子

    yīxiàzi

    1. all at once; all of a sudden; for a little while; in no time; almost immediately
    2. (following a verb) for a moment; briefly
    3. once; one time

    他一下子就明白了我的意思。 Tā yīxiàzi jiù míngbai le wǒ de yìsi.