Assembling them is labour-intensive, and so is making the parts that outside suppliers provide to the shipyards.

供应商制造向船厂提供的零部件，以及组装这些部件都是劳动密集型的工作。

Outsourcing is when organizations pay subcontractors – outside suppliers – to do work that was previously carried out in-house (see, for example, the first three combinations below).

外包是指组织向分包商（外部供应商）支付费用以完成以前在内部进行的工作（例如，参见下面的前三种组合）。