0 used when stating the second of two or more reasons or pieces of information:
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.
The problems are two-fold - firstly, economic, and secondly, political.
There are three factors to take into account: firstly location, secondly time, and thirdly staff.
I'd like to raise two issue here - firstly, staffing and secondly, budget.
There are two things in favour of this house - firstly, its proximity to my place of work and secondly, its size.
Secondly, the number of these edges we need to insert must not exceed the number of edges previously removed.
Secondly, the spatial distribution of stakes may not be sufficient to characterise the dependence of mass balance on elevation.
Secondly, inflorescences were visited by numerous nitidulids almost always loaded with pollen.
