I'm trying to do what is best, but equally I've got to consider the cost.

我想尽力做得最好，但同时我也得考虑费用。

《牛津词典》

But the best way is to keep your teeth healthy.

但是最好的方法是保持你的牙齿健康。

youdao

The best equipment is costly but is well worth the outlay.

最好的设备花费大，但这种开支很值得。

《牛津词典》

But if irrigation fails, the best thing to do is to go to a health careprovider for professional assistance.

VOA: special.2010.03.31

But what we seem to be justified in believing is not just any old explanation, but the "Best explanation."

但是,我们认为正确并坚信着的,不是某些随便的陈旧解释,而是,最佳解释

耶鲁公开课 - 死亡课程节选

but what works for me the best is to really step out of this sort of need to create

但是对我来说最有用的方法，就是要走出一种必需创造的意念

艺术从自由起步 - SpeakingMax英语口语达人

Bangladesh's limited-overs form shows it has plenty of talented players, but the best is not being made of them.

WSJ: Bangladesh Cricket Team Bruised After Tour of Zimbabwe

There are a few locations, but the best is in Wooster Square, a compact Italian-American neighborhood hemmed in by interstates and train tracks.

BBC: Where is the US's best pizza?

Of course the reader needs a reason to continue, but the best reason is simply confidence that the writer is going some place interesting.

WSJ: Word Craft: Tracy Kidder and Richard Todd on Good Prose