White blood cells and platelets are the two other kinds of blood cells, which help fight infection, while platelets help blood to clot.
白细胞和血小板是其他两种类型的血细胞，他们能够帮助机体抵御感染，血小板可以促使血液凝固。
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Your body makes three types of blood cells - white blood cells to fight infection, platelets to help your blood clot and red blood cells to carry oxygen throughout your body.
人体有三种血细胞——白细胞负责抵御感染，血小板负责凝血，红细胞则负责给全身供氧。
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White blood cells help your body fight infection. Red blood cells carry oxygen to all parts of your body. Platelets help your blood clot.