The capital city Lagos on its own accounts for about 300,000 of the total.

仅首都拉各斯的垃圾产出量就有30万立方吨。

Thus all judgements as to what is useful depend upon judgements as to what has value on its own account.

因此，关于什么有用的所有判断都取决于关于什么本身有价值的判断。

There is a big problem with this sort of relativism though, the theory of relativism itself would have to, on its own account, be relative.

然而，这种相对主义有一个很大的问题，相对主义理论本身，就其自身而言，必须是相对的。

If something is useful, it must be useful because it secures some end; the end must, if we have gone far enough, be valuable on its own account, and not merely because it is useful for some further end.

如果某物有用，它一定是有用的，因为它确保了某种目的；如果我们走得足够远，那么这个目的就其本身而言就一定是有价值的，而不仅仅是因为它对某些更远的目的有用。