1. But import competition is not a threat. 但是进口竞争不是一种威胁。
2. We are today a Nation at risk to a new and changing threat. 我们今天在危险的国家一个新的和不断变化的威胁。
3. Another threat to electricity supply comes from the power grid itself. 电力供应的另外一个威胁则来自于电网本身。
英英解释
n.
1. something that is a source of danger
2. a warning that something unpleasant is imminent
3. declaration of an intention or a determination to inflict harm on another
4. a person who inspires fear or dread