sparking contact

例句：

1. 1. The new car's engine has a sparking contact that ensures smooth operation.
   这款新车的引擎有一个火花接触，确保了顺畅运行。
2. 2. During the test, the technician used a sparking contact to diagnose the problem.
   在测试期间，技术人员使用火花接触来诊断问题。
3. 3.The scientist found a sparking contact in the old device, which could be useful for future experiments.
   科学家在旧设备中发现了火花接触，这可能对未来的实验有所帮助。