因为它们可造成施放地区长时间染毒，人员不宜立即进入该地区，所以 称这类毒剂为持久性毒剂（persistent agents）。微粉状毒剂施放后沉落于地面，人员或 车辆通过或风速较大时再度飞杨，故可造成较长时期的地面和空气染毒。
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There are also issues with chlorthalidone being a better hypertensive agent because it has a longer duration of action and more persistent reduction of blood pressure over a 24-hour period.
氯噻酮作为一个更好的高血压药物也有问题，其作用时间更长，在24小时期内能持续降低血压。
Conclusions: RECOLITE is a kind of persistent, strong-effective, and safely sterilized sterilization agent for the treatment of dentine hypersensitivity of quiescent root caries in the elderly.
结论：RECOLITE对老年人静止根面龋既有消毒作用又对其伴牙本质过敏症具有治疗作用。
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