Firstly,DNA must be recovered from the cells or tissues of the body,and only a small amount of tissue like blood,hair,or skin is needed.是什么意思_Firstly,DNA must be recovered from the cells or tissues of the body,and only a small amount of tissue like blood,hair,or skin is needed.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句