日期:
来源:雅诚德英语网
The skin is a very effective barrier to prevent the entry of pathogens. Damaged skin area is rapidly sealed off by blood clot.
皮肤是有效的屏障,能阻止病原体入侵,受伤的皮肤很快便会用血枷将伤口遮盖。
The skin is a very effective barrier to prevent the entry of pathogens. Damaged skin area is rapidly sealed off by blood clot.
皮肤是有效的屏障,能阻止病原体入侵,受伤的皮肤很快便会用血枷将伤口遮盖。