When CD4 + t cells in the blood reduced to critical level, they become increasingly vulnerable to disease infestation.

当CD 4 +T细胞在人的血液减少到临界水平，他们越来越容易受到疾病的侵扰。

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When CD4 + t cells in the blood reduced to critical level, they become increasingly vulnerable to disease infestation.

当CD 4 +T细胞在人的血液减少到临界水平，他们越来越容易受到疾病的侵扰。

youdao