killing agent的用法和樣例：
例句
- In many cases, a neuromuscular-blocking agent and a potent sedative are needed to facilitate intubation.
在許多病例中，需要使用神經肌肉阻斷劑和有效的鎮靜劑。 - Ferro Silicon ,a widely used alloy, can be used as de-oxygen agent in steel casting and steel making, can be also used as an alloy agen in making silicon steel.
硅鐵是應用廣泛的一個鐵合金品種，是鍊鋼鑄造的脫氧劑，是煉硅鋼，彈簧鋼，耐熱鋼等的合金劑。
