我曾經做過臨時工在某間店，大部分都是需要勞力。而需要專業技能的工作則會

我曾經做過臨時工在某間店，大部分都是需要勞力。而需要專業技能的工作則會由此店的員工們來做。

結果 (英文) 1:

I have done some temporary workers in the shop, mostly labor needs. The work will require specialized skills thus store employees do.

結果 (英文) 2:

I used to work as a temporary worker in a particular shop, most of which required labor. The work that requires professional skills is done by the employees of the store.

結果 (英文) 3:

I used to work as a temporary worker in a store. Most of the jobs need labor. The jobs that need professional skills will be done by the employees of this store.