The phrase "as they span" is correct and usable in written English.
It can be used to describe the extent or range of something over a period of time or across a particular area.
Example: "The research findings are significant as they span multiple disciplines, providing a comprehensive understanding of the issue."
Alternatives: "as they cover" or "as they extend over".
Time stopped as they span back and forth, inspecting the huddle of novice divers.
Müller glia are excellent targets for secreting neurotrophins as they span the entire tissue, ensheath all neuronal populations, are numerous, and persist through retinal degeneration.
Furthermore, specific non-linear methods that utilize factor variable for day types fall into this category as well, as they span up the same space of possible solutions.
These resources are a key feature of the argument as they span the whole introduction, beginning in the second clause complex and continuing through to the fourth last.
In the case of bioenergy systems, the described categories of uncertainty cannot be simply grouped, as they span across the different types and sources of uncertainty.
There is an overall unity in Novalis's political writings, as they span almost the entire ten years of his productive period: the idea that democracy can only be effectively realized among a people that is historically ready for it, that such readiness takes a capacity for critique and independent thinking, and that Bildung is the way in which independent thinking is best achieved.
We selected these accessions for this study as they spanned the genome size range of the 22 in our initial survey of Arabidopsis.
As expected, they span a wide energy range, up to 400 meV.
As you can see they span all genres – comedy, horror, drama, etc.
We count all those hits as valid copies when they span at least half of the query sequence length with ≥80% nucleotide similarity.
Whereas they span it as grumpy and miserable – good British traits – I added cynicism to the mix.
