Gold is more valuable than iron in price but less useful.

黄金在价格上比铁更值钱但不如其有用。

youdao

If I had not had so much ambition and not tired to do so many things, I probably would have been much happier, but less useful.

如果我不是如此地雄心勃勃，没有努力地做那么多事，我也许可以活得更幸福些，但那样的话我可能不会是个像今天这样有用的人。

youdao

But it is probably more useful and certainly less dangerous.

但是它可能更加有用也无疑危险程度更低。

youdao

Their work there was aimed at separating the light, fissile isotope of uranium (useful for making bombs and reactors), from its more abundant, but less useful, heavy cousin.

ECONOMIST: Diamonds

The offering is proof that while hard partying 20-somethings at start-ups such as Yelp may grab headlines, the new tech boom is creating real money for companies that may be less sexy but more useful.

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But he says they are less useful for vegetables, which often carry less harmful bacteria.

BBC: Should you smell food before throwing it away?