attack with teargas; subject to teargas fumes;

"The students were teargassed during the riot"

a gas that makes the eyes fill with tears but does not damage them; used in dispersing crowds

A youth uses a cameraphone to capture the aftermath of a teargas volley fired by police on protesters near Tahrir Square in Cairo, Egypt.

埃及开罗的解放广场，一名青年掏出手机，用快照记录下警察用催泪瓦斯驱逐示威者后的一片狼藉。

Police had fired teargas and stun grenades at demonstrators who tried to force their way into parliament.

警方向试图闯入国会的示威者发射了催泪瓦斯和眩晕手榴弹。

One police tactic is to use teargas to drive them out of the tunnels, causing stampedes in which some have been crushed.

警方的另一个常用战术是用催泪弹将采鉆者赶出矿道，这已经造成了人们互相践踏丧生。

Security forces have generally used batons and teargas in Damascus to avoid inflaming protests in the heartland of the regime's power.

在大马士革，安全部队使用了警棍和催泪瓦斯来阻止过度的抗议活动沖击政府机关所在的中心区域。

Police fired teargas at some Han Chinese demonstrators, who briefly broke through police lines, the Reuters news agency reported.

据路透社（Reuters）报道，警方向一些汉族示威者发射了催泪弹，这些人曾一度沖破了警方的警戒线。

The gunman was shot in the head by a police sniper after he wounded one policeman and teargas grenades were finally tossed into the vehicle.

在绑匪击伤一名警察之后，绑匪才被狙击手爆头，催泪瓦斯才扔向巴士。

Protesters threw at least one petrol bomb, which exploded behind the army line as teargas hung in the air.

示威者投掷的至少一枚汽油弹在催泪瓦斯弥漫的军防线后面爆炸。