and so the tools of long ago have remained when even the bones of the men who made them have disappeared without trace.

因此，尽管制造这些工具的人的骨头早已荡然无存，但远古时代的石头工具却保存了下来。

because they are unwilling to have their names entered as having taken out such and such a book,

因为它们不愿让人家记下它们公司的名字和借阅的某一本书。

if, in a word, beauty means something, yet we must not seek to interpret the meaning.

一句话，如果美有某种意义的话，我闪，千万不要去阐明它的意义。

The hovercraft is particularly useful in large areas with poor communications such as Africa or Australia;

气垫船在非洲、澳大利亚等交通不发达地区特别有用。

while our own compulsory school attendance became law in Germany in 1642,

而我们的义务教育成为法律在德国是在1642年，

Normal people tend to forget this process unless and until they are reminded of it.

衰老的过程，不经提起，正常人容易忘记；一经提醒，才会记起。