The evidence seems to favor the view that the fundamental structure of the virus is a hollow tube.

故事不是用来阅读的信，而是一扇等待被打开的门。

给一个人火，他能温暖一天；但把他点燃，他能温暖余生。

An artist's job is to make the invisible visible.

Success is not final, failure is not fatal: it is the courage to continue that counts.