Ohp
abbr. overhead projection 高架發射, 頂置防護; oxygen at high pressure 高壓氧氣
??? 情景例句
I designed it myself.
這是我自己設計的。
Public money is like holy water, every one helps himself to it.
公款如圣水，人人都要嘗一嘴。
a wave length (the horizontal distance between two wave crests),
波長（兩個浪峰間的水平距離）