耐药性已使多数较陈旧的抗疟药物失去效用。
Most older antimalarials have been rendered useless by drug resistance.
一般来说，抗疟药物耐药性首先通过疟原虫中罕见的自发变化出现。
Generally, antimalarial drug resistance first emerges through a rare spontaneous change in the malaria parasite.
喹啉类药物仍是目前主要应用的抗疟药。
Quinolines are the main antimalarials that are still in use at present.
喹啉类药物仍是目前主要应用的抗疟药。
Quinolines are the main antimalarials that are still in use at present.
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