crosspiece
n. 闩;横木
例句
He crosspiece with disapproval of her conduct.
他很不赞同地谈起她的行为。
The crosspiece of the trousers is not made well.
这条裤子横裆处做得不很合适。
The crosspiece of ladder is never for rest. It just supports one foot when the other goes higher.
梯子上的横档从来不是用来休息的,只是为了在一只脚迈向更高处时,另一只脚可以有一个支撑。