it is long been proven that

意思翻译 长期以来，事实证明 相似词语短语 it is long───它很长 that is it───就这样 is that it───就是这样 it is that───是这样，就是嘛 it is very long───它很长 how long is it───有多长时间 it is long way───还有很长的路要走 it is a long───这是一个很长的 it is long day───今天是漫长的一天 双语使用场景 ...