I don't know if you know how a spark plug works, but for the electrical current to fly into operation in a spark plug, the two points of contact have to be gapped.

我不知道你们是否知道,火花塞是怎样工作的，在电流通入火花塞中使它运转之前，两个接触点之间需要有空隙。

耶鲁公开课 - 文学理论导论课程节选

The surge in Two-up's popularity during World War I didn't spark a change.

WSJ: Two-Up, A Game Australians Flip Over, Loses Luster When Legalized

However, video chat alone likely won't spark a mass exodus from Facebook.

CNN: How Google+ compares to Facebook

But it was expensive and more importantly, it didn't spark any leads.

CNN: 'Radio Want Ads' are hit with Louisville job-seekers, employers