flak
noun [ U ] (also flack) uk/flæk/ us/flæk/
(CRITICISM)
informal严厉批评;激烈反对
strong criticism or opposition
She took/caught some flak from her parents about her new dress. 她的新衣服遭到了父母的一通批评。
(FIRING OF GUNS)
高射炮火;高射炮弹
the firing of guns from the ground at enemy aircraft, or the bullets, etc. that the guns fire
They flew into heavy flak over the target area. 他们飞进目标地区，遭到了高射炮火的猛烈射击。