singly
adverb /ˈsɪŋɡli/
  /ˈsɪŋɡli/
- alone; one at a time单个地;单独地;一个一个地 - The stamps are available singly or in books of ten.邮票有单枚的,也有十枚一册的。 
- Guests arrived singly or in groups.客人有单个来的,也有三三两两一起到的。 
- The perfumed oils can be used singly or blended with others.香油可以单独使用,也可以和其他的混合使用。 
 
- The stamps are available singly or in books of ten.