一；一个；单一的

one; a single; first of several

独自的；单独的；无伴的

alone; solitary; without a companion

唯一的；卓越的；无与伦比的

unique; sole; pre-eminent; unparalleled

同一个；相同的；同一的

same; one and the same; identical

某一个；某个；某些；有些人

a certain; some; someone; (pl.) some people

一次；一度；曾经

once; one time; at one time