scrape by
[phrasal verb] also scrape along 1
: to live with barely enough money : to be able to buy only the things you need most勉强度日；勉强糊口 -
Money was tight, but we somehow managed to scrape by. [=survive]我们当时手头很紧，但还是设法挺了过来。
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She's scraping along on just a few hundred dollars a month.她靠着一个月几百美元勉强度日。
2
or scrape through : to succeed at doing something but just barely勉强成功