短语词组短語by in twos and threes 三三兩兩地by twos in pairs 成雙地by twos number 二by ones and twos 三三兩兩地;兩兩地;零零落落地;零零散散by twos and threes 三三兩兩地;零零星星;兩三個一次;零星地by ones or twos 三三兩兩;零零落落by ones and by twos 三by y ones or twos 三三兩兩 返回 by twos