first的副词形式是什么
firstly adv. 首先（主要用于列举条目、论点时）；第一；
It makes you look firstly at how youre treated and secondly how you treat everybody else.
Firstly, we can have a good stab at what will be on that menu.
首先，我们可以尝试看一下菜单上有什么。
Firstly, it reveals process faults upstream that can be corrected.
首先，它从后往前指出那些可以更正的工序故障。
Firstly, we should think about the health care experience as a whole.
首先，我们应该把医疗体验作为一个整体来考虑。
Firstly, you need to rush to open space quickly if you are in a lower floor.
首先，如果你在较低的楼层，你需要迅速冲到开放空间。