用双手的 meaning in English
bimanual
Examples
- Hold the floss tightly between the thumbs and forefingers of both hands , leaving about 2 cm of floss in between . use a back and forth motion to gently slide the floss towards the gingivae between the teeth
用双手的拇指及食指操纵一段约2厘米长的牙线，前后拉动牙线并慢慢地让它滑进牙缝内；