one-shot
Longman Dictionary of Contemporary English 5++LDOCE 5++ˈone-shot adjective [only before noun] American English ONCEhappening or done only once 只发生一次的；一次完成的 SYN British English one-off This is a one-shot deal. If it doesn’t work, it’s over. 这是一次性的交易，如果不成，那就拉倒了。
Examples from the Corpus
one-shot• Scientists and administrators bickered over whether this should be a continuing program in ocean-bottom drilling or a one-shot drive to the mantle.• As with non-co-operative playing of the one-shot game, the tacitly collusive equilibrium still requires information.• They really trust these silly, one-shot tests more than they trust me!• But they are one-shot treatments and so are not subject to the whims of patient compliance with complex drug regimes.ˈone-shot adjectiveChineseSyllable
once done or only Corpus happening
one-shot
ˈone-shot
adjective [only before noun] American English
happening or done only once
SYN one-off British English:
This is a one-shot deal. If it doesn’t work, it’s over.
ˈone-shot
adjective [only before noun] American Englishhappening or done only once
SYN one-off British English: