thirdly

Thirdly, we must consider the environmental impact of building the new factory.

(Chinese) 第三，我们必须考虑建设新工厂对环境的影响。

Firstly, it's expensive; secondly, it's slow; and thirdly, it's unreliable.

(Chinese) 首先，它很贵；其次，它很慢；第三，它不可靠。