sight-hole

基本解釋

• n.觀察孔光學(xué)瞄準(zhǔn)器

同根派生

• sight-hole相關(guān)詞

英漢例句

• Causes and prevention of boiler sight hole leakage
  鍋爐檢查孔泄漏的原因及預(yù)防
• His strength in a crisis is an ace in the hole.
  臨危不懼是他的看家本領(lǐng)。
• 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(biāo)就射擊。

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