4周搞定2000+托福核心词
其次；第二
secondly
常考释义
And secondly, the floors on these structures were elevated.
第二个原因是，这些建筑上有层层上升的阶梯。
来源于：听力OFFICIAL35 L2adv. 第二；其次
Firstly, it's too expensive. secondly, it wouldn't work.
首先，它太贵了；其次，它没有用。
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