Words similar to firstly

Example sentences for: firstly

How can you use “firstly” in a sentence? Here are some example sentences to help you improve your vocabulary:

Firstly, the trigger for the sustained elevation in cytoplasmic calcium may occur at the level of the ER, and secondly, this effect may also contribute substantially to the neurotoxicity of mefloquine.
Firstly, Capron and Reis [2] misunderstood our quantitative analyses.
Firstly, because with $10 worth of stamps and a pen pal I could make it circle the globe another nine times all by myself.
Firstly, the extremely high probability of infection in high-dose challenge studies conflicts with the low transmission rate of HIV per sex act [14–17].
Firstly, shorter toxicant exposure time ensured that any changes observed in specific mRNA transcript levels were due to the direct cellular effects of mefloquine, rather than secondary effects caused by changing culture conditions (since drug-treated NG108 cells divide less rapidly than DMSO-treated cells).