That's how tight the junctions are, not even a small molecule like glucose can pass between them.
可见胞间连接多么紧密,甚至像葡萄糖这样小的分子也不能通过
And the means by which I connect to the so called cloud is with a command line program or GUI program.
连接到所谓的“云“上,方法是一条命令行程序,或GUI程序。
There's a valve between them.
和一个连接它们的阀门。
应用推荐