Xb
abbr. crossbar 縱橫開關; 交叉棒; 閂; exploding bridgewire 爆炸橋絲點火器（代號）
??? 情景例句
Please, you sit by the window.
你請靠窗坐。
He that sups with the devil must have a long spoon.
與惡人交往，須特別提防。
Sam, what are you going to do tomorrow?
山姆，你明天打算干啥？