戒尺 meaning in Chinese

[旧时用语] teacher's ruler for beating pupils; plamer

Venus herself supplies resolution and boldness to boys still subject to discipline and the rod .
维纳斯向那些仍然受纪律和戒尺约束的男孩子提供了决心和勇气。
No mere ferule will answer for this offence
你犯了这样大的错误，光用戒尺不能解决问题。
His rod and his ferule were seldom idle now - at least among the smaller pupils
他手中的教鞭和戒尺现在很少闲着，至少对那些年较小的同学可以这么说。
The master was walking up and down the room with the iron ruler under his arm and a book in his hand
老师在教室里踱来踱去，胳膊下夹着铁戒尺，手里拿着书。
It means it has a special function , special date , special user , special object , special efficacity . . . . . . . just a guess
说明戒尺有其特殊作用,特定的年份,特定的用者,特定的对象,特定的效力. . . . . .呵呵!瞎猜的