two的序数词和副词
two序数词为second，副词为secondly 例句 1. Firstly, it's expensive, and secondly, it's too slow. 首先是价格贵，其次，速度太慢。 2. You need, firstly, a strong independent board of directors and secondly, an experienced and dedicated staff. 你首先需要一个强大的独立董事会...