killing agent的用法和样例：
例句
- In many cases, a neuromuscular-blocking agent and a potent sedative are needed to facilitate intubation.
在许多病例中，需要使用神经肌肉阻断剂和有效的镇静剂。 - 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.
硅铁是应用广泛的一个铁合金品种，是炼钢铸造的脱氧剂，是炼硅钢，弹簧钢，耐热钢等的合金剂。
