Circularly linked lists can be either singly or doubly linked. They are most commonly encountered singly or in pairs. The simple leaves are alternate, singly or doubly serrate, feather-veined, petiolate and stipulate. It tends to forage singly or in pairs. Geocomposites are a combination of synthetic materials that are ordinarily used singly. They arise singly or in loose groups. Most jurisdictions permit rear fog lamps to be installed either singly or in pairs. The kama can be used singly or in pairs. Eagles mainly steal larger prey and will attack secretarybirds both singly or in pairs. It is most often seen traveling or feeding singly or in pairs. These are notations for describing states of singly excited atoms, especially noble gas atoms. Thus, histamine is normally protonated to a singly charged cation. An aqueous solution contains a significant portion of sulfide ions that are singly protonated. Targets can be reliably imaged through the application of multiple short singly labeled oligonucleotide probes. There they had to fight singly or in pairs.