问题描述：
英语翻译
blood vessel :a tube carrying blood away from or towards the heart.blood vessels are the means by which blood circulates throughout the body.
要自己翻译~不要自动翻译机来直接翻译~
blood vessel :a tube carrying blood away from or towards the heart.blood vessels are the means by which blood circulates throughout the body.
要自己翻译~不要自动翻译机来直接翻译~
问题解答：
我来补答展开全文阅读