sight-hole
基本解釋
- n.觀察孔光學瞄準器
英漢例句
- Causes and prevention of boiler sight hole leakage
鍋爐檢查孔泄漏的原因及預防 - His strength in a crisis is an ace in the hole.
臨危不懼是他的看家本領。 - The oil tanker soon got out of sight.
油船不久就看不見了。 - She was sick at the sight of the blood.
她一見到血就感到惡心。 - The sentry was ordered to shoot on sight.
哨兵奉命一發(fā)現(xiàn)目標就射擊。