持久性毒劑

persistent agent

to hold / to grasp / to support / to maintain / to persevere / to manage / to run (i.e. administer) / to control

lasting / enduring / persistent / permanent / protracted / endurance / persistence / to last long

(long) time / (long) duration of time

nature / character / property / quality / attribute / sexuality / sex / gender / suffix forming adjective from verb / suffix forming noun from adjective, corresponding to -ness or -ity / essence / CL:個|个[ge4]

poison / to poison / poisonous / malicious / cruel / fierce / narcotics

a poison / a toxic agent / poison gas / a chemical weapon

dose (medicine)