他把文字又改了回去，还加了一句话：“如果你什么都不懂的话就最好闭嘴，多瑙河塔显然就是一座电视塔（还击）。”
He changed the article back again and wrote: "If you don't know anything, you should just keep your fingers still -- the danube tower is obviously a ttelevision tower (sic)."
最好的方法就是知道何时说话，何时闭嘴。
The best way is to know when to speak and when to be silent.
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