1、侧重强调课题专一
新概念英语15 ... go to extremes 走极端 on ==about 侧重强调课题专一 refuse to publish it refuse: decline: vt. 拒绝（态度严厉） vt. 婉言谢绝 ...
slg on or about开航日期
On Writes About Here就写到这里
go on prating about口口声声
on zhoulibringing about prosperity周礼致太平论
on or about约于;或约;关于左右
on worry about担心
sailling on or about涩左右
Effective on or about自…日起或在该日前后生效
On Setting about Offence论着手实行犯罪