一个

singleton; single; one; an

时代

age; time; era; day; chapter; period; epoch

结束

end; finish; conclude; terminate; closure; close; complete; culminate; desist; wind up; wrap up; bring to a close; call it a day; draw to a close; put an end to; come to an end; hang up; break off; top off; completion; conclusion; termination; ending; final; done; over; closing; through; concluding; terminal; out; last; by the end of; following the conclusion of