It is a major risk factor for heart disease, which remains the biggest killer in the world's most populous nation.
它是导致心脏病的主要因素。心脏病仍是人口大国中人口死亡的主要原因。
Smoking is a major risk factor for that chronic ailment along with heart disease, the country's top killer.
吸烟是慢性病症的主要危险诱因，也是头号杀手心脏病的主要诱因。
The factor was released from immune cells called natural killer (NK) cells in the liver, but only if another immune cell, the macrophage, was present.
该因子由肝脏中被称为自然杀伤(NK)细胞的免疫细胞释放，但是只有当另一种免疫细胞，巨噬细胞存在时才释放。
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