Then jack was in the building the sniper fired from 那么当前总统帕默尔被暗杀的时候
2.
Shoulder weapons ( except for tear gas launchers ) are very rarely needed on the college campus ; they should not be used except as emergency equipment in the face of sniper fire or armed resistance justifying them 肩携式武器(催泪弹发射器除外) ，在校园中极少有必要，因此不应使用，唯一的例外是在面临狙击或武装抵抗时，用作必要的紧急配备。
