beneficial /ˌbɛnəˈfɪʃəl/ adjective Learner's definition of BENEFICIAL
[more beneficial; most beneficial]
: producing good or helpful results or effects : producing benefits有益的;有幫助的;有利的 -
He hopes the new drug will prove beneficial to/for many people.他希望新藥將有益於衆人。
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Regular exercise has many beneficial health effects.經常鍛煉有益健康。
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They have a relationship that is beneficial to/for both of them.他們保持着一種互惠互利的關系。
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Some insects are harmful but others are beneficial.有些昆蟲是害蟲,而有些則是益蟲。