有两个很好的理由我们不能做这件事。首先，我们没有足够的钱，其次，我们没有足够的时间。
There are two very good reasons why we can't do it. Firstly, we don't have enough money, and secondly, we don't have enough time.
▼点击显示答案
firstly英 /ˈfɜːstli/|美 /ˈfərstli/
解释
Firstly 是副词 first 加上后缀 -ly 构成的，first 意思是"第一、首先"，-ly 后缀表示副词形式。firstly 用于列举事项时表示"第一点、首先"，通常与 secondly（其次）、thirdly（第三）等词配合使用。
There are two very good reasons why we can't do it. Firstly, we don't have enough money, and secondly, we don't have enough time.
Firstly 是副词 first 加上后缀 -ly 构成的，first 意思是"第一、首先"，-ly 后缀表示副词形式。firstly 用于列举事项时表示"第一点、首先"，通常与 secondly（其次）、thirdly（第三）等词配合使用。