医生小心地控制硝化甘油的剂量来治疗患者的心脏问题。

The doctor carefully controlled the ___nitro-glycerine dosage to treat the patient's heart condition.

这个话题就像硝化甘油一样危险，随时可能引发激烈争论。

This topic is like ___nitro-glycerine—it could spark heated arguments any moment.