生病时免疫系统在工作。生病時免疫系統在工作。生病時免疫系統在工作。

When you are sick, your immune system is hard at work.

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Simplified: 生病时免疫系统在工作。
Traditional (Taiwan): 生病時免疫系統在工作。
Pinyin: Shēngbìng shí miǎnyìxìtǒng zài gōngzuò.
Bopomofo: ㄕㄥㄅㄧㄥˋ ㄕˊ ㄇㄧㄢˇ ㄧˋ ㄒㄧˋ ㄊㄨㄥˇ ㄗㄞˋ ㄍㄨㄥㄗㄨㄛˋ。

Written with HSK 2 vocabulary, at CEFR level A1.

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免疫系统

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