躲在屏幕背后的键盘侠们总是恶意攻击他人。

Those anonymous ___snipers behind screens always make malicious attacks on others.

狙击手们隐藏在屋顶上，准备伏击敌方指挥官。

The ___snipers hid on the rooftops, ready to ambush the enemy commander.

躲在网名背后的键盘侠们总是无情地批评他人。

Internet ___snipers hiding behind usernames always criticize others mercilessly.