B: Oh, I'm too lazy to play sports, and I'm not good at anything either. It hardly excites me.
噢,我太懒了,不想打球,而且我什么都不在行。我对运动没兴趣。
These results suggest that the complement system may play an important role in the host's natural defense against B. Anthracis invasion at the pre-immune phase.
实验结果表明:补体系统在机体产生特异性免疫之前,对机体防御炭疽菌的侵袭起着重要作用。
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