Collins Chinese Dictionary Plus (3rd edition), 2011:
useful [ˈjuːsful]
adj
有用的 yǒuyòng de
- to be useful to or for sb
对(對)某人有用的 duì mǒurén yǒuyòng de - to be useful for sth/doing sth
对(對)某事/做某事有帮(幫)助的 duì mǒushì/zuò mǒushì yǒu bāngzhù de - it's useful to keep a diary
写(寫)日记(記)很有助益 xiě rìjì hěn yǒu zhùyì - it would be useful for us to have more information
得到更多的信息会(會)对(對)我们(們)很有用 dédào gèngduō de xìnxī huì duì wǒmen hěn yǒuyòng - to come in useful
有帮助 yǒu bāngzhù
在这些条目还发现'useful'：
在英文解释里：
asset
- bargaining chip
- come in handy
- convenience
- convenient
- dead
- expedient
- gadget
- gizmo
- good
- good use
- handy
- help
- helpful
- impractical
- inexpedient
- life
- necessity
- not be good for
- of some help
- over the hill
- pragmatic
- purposive
- resource
- right people
- service
- shelf life
- stand in good stead
- treasure trove
- unpractical
- usable
- useless
- utilitarian
- utilizable
- what's what
- work
- workhorse
- worth its weight in gold
中文：