ADJ
迄今最…的；空前的；创纪录的
You use all-time when you are comparing all the things of a particular type that there have ever been. For example, if you say that something is the all-time best, you mean that it is the best thing of its type that there has ever been.
例句
The president's popularity nationally is at an all-time low...
总统在全国的人气目前正处于历史最低点。
Duane Eddy is John Peel's all-time favourite artist.
杜安·艾迪是约翰·皮尔迄今最喜欢的艺术家。