But so far, improvement in vision has persisted as long as two years after a single treatment without evidence of significant adverse side effects.
但到目前为止，在经过一次性治疗后，病人视觉的改善最长已经维持了两年时间，没有证据显示出现了明显的不良副作用。
Google has finally released a beta version of its long-awaited and much anticipated blog search, two years after it acquired the popular Blogger technology.
21 Google终于推出了备受期待迟迟没有发布的博客搜索，他们收购流行的Blogger技术已经两年过去了。
After two years in Washington, I often long for the realism and sincerity of Hollywood.
在华盛顿住过两年以后，我常常对在好莱坞的现实主义和真诚的生活充满了渴望。
If I should meet you. After long years. How should I greet you? With silence and tears. -when we two parted by George Gorden Byron.
假使我又见你，隔了悠长的岁月，我该如何致意？以沉默，以眼泪。—拜伦《当我俩分别》。
When I was twelve years old I spent two months in a hospital and during the depressing long days with no other entertainment around I drew day after day the dream worlds I wanted to go to.
我十二岁那年，我在医院住了两个月，在那段没有其他娱乐又有些压抑的日子里我日复一日的画着那些我梦想去的世界。
When I was twelve years old I spent two months in a hospital and during the depressing long days with no other entertainment around I drew day after day the dream worlds I wanted to go to.
我十二岁那年，我在医院住了两个月，在那段没有其他娱乐又有些压抑的日子里我日复一日的画着那些我梦想去的世界。
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