1·There are a couple of refinements we can do to improve the reusability of our work and to make it easier to use more than one trait at a time, i.e., to "stack" them.
我们可以通过一系列精炼来提高我们工作的可重用性，使得我们可以更容易地同时使用一个以上的Trait，例如，“堆叠”它们。
2·Nickel rod needs to be lengthen by argon arc welding before the electroslag refinements, large welding parameters are needed to assure the sufficient penetration.
金属镍在电渣精炼前需用氩弧焊焊接接长，为保证焊接接头具有足够熔深，需要大参数进行焊接。
3·I should say, uld has been around for quite a while but there have been some recent refinements.
我必须说，ULD已经产生了一段时间了，但是最近进行了一些精炼。