A spark is a flash of light caused by electricity. It often makes a loud sound.
电火花 • He passed an electric spark through a mixture of gases. 他使一束电火花穿过一团气体混合物。
If something sparks, sparks of fire or light come from it.
发出火花 • The wires were sparking above me. 电线正在我头顶上方冒火花。