免疫
miǎn yì
immunity (to disease)
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他以为这是免费的。
tā yǐ wéi zhè shì miǎn fèi de。
He thought it was free.
疫情让大家都很担心
yì qíng ràng dà jiā dōu hěn dān xīn
The epidemic has made everyone worried.
疫情让大家都戴口罩
yì qíng ràng dà jiā dōu dài kǒu zhào
The epidemic has forced everyone to wear masks.