someone's back is turned
US /ˈsʌm.wʌnz bæk ɪz tɜrnd/
UK /ˈsʌm.wʌnz bæk ɪz tɜrnd/
1.
某人转身时, 某人不注意时
when someone is not looking or paying attention
:
•
The children started playing pranks as soon as their mother's back was turned.
孩子们一等妈妈转身，就开始恶作剧。
•
He always tries to sneak a cookie when my back is turned.
我一转身，他就想偷偷拿块饼干。