“在后”怎么读

“在后”的英语可以翻译为：ehind，later，as follows，postero-，posteriority ...

框架用横杆牢牢固定在后墙上。The frames are secured by horizontal rails to the back wall.瘾君子们在后街小巷里注射毒品。Drug addicts shoot up in the back alleys.他们在后花园有一棵极好的桦树.They've got a wonderful birch in the back garden....