问：世界卫生组织在早期开发青蒿素类复方药上发挥了何种作用？
Q: What role did the World Health Organization (WHO) play in the early development of ACT?
青蒿素及其衍生物代表着一类新型抗疟药。
Artemisinin and its derivatives represent an important new class antimalarial drug.
青蒿素及其衍生物代表着一类新型抗疟药。
Artemisinin and its derivatives represent an important new class antimalarial drug.
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