youdao

Spiders do not take well to farming, and as they are mostly teeny little creatures, they don't produce enough silk to be useful in large-scale production.

蜘蛛不适宜大规模养殖，而且由于蜘蛛多为微小的生物，所以它们产出的蛛丝不足以用于大规模生产。

youdao

Recent studies have shown lipoplexes to be useful in transfecting respiratory epithelial cells.

最近的研究表明脂质体在转染呼吸道上皮细胞中是有用的。

youdao

Some studies suggest that punishment can be too costly to be useful.

VOA: special.2009.03.03

It appears to be useful in that way but I imagine it does more compelling things these days but I have not seen it myself.

那样看起来仿佛比较有效果,但我想这些天它非常引人注目,只是我自己没看到而已。

哈佛公开课 - 计算机科学课程节选

This is why a dream diary or writing up-- writing your dreams as soon as you wake up turns out to be useful.

所以梦境日记-,要在醒来后马上写,这很有帮助。

耶鲁公开课 - 心理学导论课程节选

Second, bitcoin transactions take too long for confirmations to be useful in everyday transactions.

FORBES: Bitcoin Obliterates 'The State Theory Of Money'

Mobile devices need to have enough digital storage to be useful to the user.

FORBES: Are Fat Tablets in Your Future?

For some newcomers, though, it's hard to develop big enough networks to be useful.

FORBES: Magazine Article