非常抱歉，您试图访问的页面不存在，或者出现未知错误，您可以试着重新打开，或者访问其他页面。

We're sorry, the page you are trying to access does not exist, or there is an unknown error, you can also try to re-open or visit other pages.

youdao

运用该理论的第一部分就是避免因为未知而出现的错误。

The first section he applies this theory to is unknowns. He writes.

youdao

但未修改现有语句结束符之后所出现的语法验证错误。如果您停止语法验证而运行这个脚本，您会得到未知字符的错误。

If an error occurs, the script will stop running, and all successful statements are rolled back.

youdao