a)able to be used for a particular period of time 能使用〔多久〕,〔多长时间内〕有效SYN valid
good for one month/a year etc
Your passport is good for another three years.
你的护照还可以用三年。
b)likely to continue living or being useful for a particular time or distance, even though old or not in good condition 能维持〔一段时间〕,能持续〔一段距离〕
good for some time/a hundred miles etc
This old truck is good for another 100,000 miles.
这辆旧卡车还能跑十万英里。
c)informal likely to give you something or provide something 可能会给予某物,可能会提供某物
Dad should be good for a few bucks.
爸爸应该会给我几块钱的。
Examples from the Corpus
good for something• Not much good for anything else.• So Princeton looked good forcollege until I met their pretentiousadmissionsrep.• Life in Solano County had been good for him and Annette, he said.• This was good for his journalism.• The buffalorobes were good for keeping warm in carriages in northern cities.• The more physical the better for me.• Armed with inadequate information he usually fails to see why one moment is better forputting in a tack than any other.• She lost the first two babies, you know that, and she's always done her best for you.