flak
n[U]
1 guns shooting at enemy aircraft; fire from those guns 高射炮; 高射炮火
run into heavy flak 陷入密集的高射炮火中.
2 (infml 口) severe criticism 严厉的批评
The plans for the new tax have come in for a lot of flak, ie have been very strongly criticized. 新的税务计画遭到了猛烈抨击.