sudden

a.突然的，出乎意料的

succubus, succulence, succulent, succumb, such, such a(an) that, such as, such being the case, such-and-such, such...that, such...that..., suchlike, suck, suck up, sucker, sucking-pig, suckle, suckling, sucrose, suction, suddenly, suddenness, suds, sudsy, sue, suede, suet, suety, suffer, suffer from, sufferance, sufferer, suffering, suffice, sufficiency, sufficient, sufficiently, suffix, suffocate, suffocating,