n.威胁；恐吓；凶兆
His presence is a threat to our success. 他的出现对我们的成功是一个威胁。
Pollution poses a threat to the continued existence of this species. 污染对这一物种的继续生存造成了威胁。
He took not notice of his father's threat. 他不理会他父亲的恐吓。
There was a threat of typhoon. 有刮台风的征兆。
threat属于类名词，句子We disregarded all his threats里的threats不能以它的单数形式threat出现；
threat后可接to的不定式。 The tenants disregarded their landlord's threat to expel them.这些租客完全漠视房东要把他们驱赶出去的威胁。
threat后可接不同的介词，如of，to等。 There was then a continual threat of war.There was then a continual threat to peace.
