互相通 meaning in English

interpenetrate

So they went on for quite a time , writing , and meeting occasionally in london
这样，他们继续了好久，互相通着信，偶尔也在伦敦相会。
The person ' s eye , nose , oral cavity is connected each other , be like : drop eyedrop can enter the mouth in , what guttural secretion goes out from nose is drivel , going out from the mouth is phlegmy
人的眼睛，鼻子，口腔是互相通的，如：滴眼药水能进入嘴里，咽喉的分泌物从鼻子出去的是鼻涕，从嘴出是痰。