resolder       
verb [ T ] (also re-solder) uk/ˌriːˈsəʊl.dər/
 用锡焊接
to use solder (= a soft metal that is melted) to join back together pieces of metal that have come apart
  Repair detached pins by resoldering them with a soldering iron. 用烙铁把脱落的引脚焊接起来。 
 I re-soldered a broken wire in the handset. 我把手机里断了的电线焊接好了。 
 - More examples
 - I was confident that when the circuit was resoldered, the motor would work again.
 - To repair the break, either get a new cable or cut into the cable and re-solder it.
 - I fixed a hole in the petrol tank, put in a new resonator, and had the radiator resoldered.