unpleasant criticism

He has been subjected to constant sniping and questioning of his achievements. 他因其取得的成就一直受到不断的抨击和质疑。

She is angered by the continual sniping from the sidelines. 她被来自场边不断的批评激怒了。

the act of shooting at someone from a position where you cannot be seen

They are trained in the use of sniping and other violent tactics. 他们接受过使用狙击和其他暴力战术的训练。

Following a burst of sniping, the Prime Minister threatened to invade if "one more bullet" was fired. 在多次狙击事件发生后，总理威胁说，如果“再射一颗子弹”，他就会入侵。