Farewell past,once,once we,goodbye. 告别leave; part from [with]; bid farewell to; say good-bye to; adieu 过去go over; pass by; in [of] the past; formerly; previously 曾经ever; once; at one time; at one time or another; e'er 自己oneself; of one's own side; closely related; ourself; personally 再见adieu; good-bye; see you again; I'll be seeing you.; So long.