Common wisdom has it that staying indoors, where it's warm and toasty, is easier on your immune system than being outside in the cold.
一般人对于免疫系统的熟悉，都是觉得待在暖和恬静的室内比待在严寒的外面好。
Common wisdom has it that staying indoors, where it's warm and toasty, is easier on your immune system than being outside in the cold.
一般人对于免疫系统的熟悉，都是觉得待在暖和恬静的室内比待在严寒的外面好。
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