Plumb rule
n. 錘規，垂直準測規
?? 詞語組成解析
rule
[ru:l]
n. 規則，規定;統治，支配;章程;
vt.& vi. 控制，支配;判定;裁定，裁決;價格穩定;
vt. 統治;規定;管理;裁決;
vi. 統治;管轄;裁定;
??? 情景例句
and they lived in New York.
而他們住在紐約。
The mining area is centered large in the north.
那里的采礦區大部分集中在北部。
Those who failed to get in need not have felt disappointed, as many of the artistes who should have appeared did not come.
那些沒能進到場內的人沒有必要感到失望，因為很多應該出場的專業演員都沒有來。