singly

Our catastrophes used to come at us singly: one earthquake at a time, one flood at a time, one economy-busting drought or recession at a time.

Extracellular, doubly charged copper ions are reduced to singly charged copper, transported into the cell, stored in pools, and transferred to the biomolecules that require them on demand.

Sometimes these symptoms occur in combination, or singly.

But change fees will be eliminated for passengers in the other three groups, who will also be able to buy extras such as seat selection and bringing a carry-on bag in bundles instead of singly.

Whether given singly or in combination, the drugs caused their testosterone to plummet.