one-off

n, adj (thing) made or happening only once 一次性的; 一次性的事物: Her novel was just a one-off -- she never wrote anything as good as that again. 她的小说是她绝无仅有的作品--後来她再也没写出那样好的东西.

once for all, once in a while, once more, once upon a time, oncologist, oncoming, one, one after another, one another, one day, one p (also 1p), one's bread is buttered, one's opposite number, one-, one-armed bandit, one-horse, one-liner, one-man band, one-man show, one-night stand, one-sided, one-sidedly, one-sidedness, one-time, one-to-one, one-track mind, one-upmanship, one-way, onerous, oneself, ongoing, onion, online, onlooker, only, only that, only too, ono, onomatopoeia, onomatopoeic,