fusing

The bones of the skull are not properly fused at birth.

出生的时候头骨结合得并不紧密。

The heat of the fire fused many of the machine's parts together.

炽灼的大火把机器的很多部件都熔化在了一起。

Either my headlights have fused or the bulbs have gone.

要么是车前灯的保险丝断了，要么是灯泡坏了。

Have you tried changing the fuse?

你试没试过换根保险丝？

He lit the fuse and ran.

他点燃了导火索后就跑了。