查询词典 isnt.

You are good, but your English probably isnt perfect.

你是好样的，但是你的英语大概不是熟练的。

This is important, isnt it?

这很重要，不是吗？

This dress is made of silk, isnt it?

这件衣服是绸做的，对不对？

Curzon street isnt mary living there

可胜街？玛丽不是也住那儿吗？

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。