What is the translation of 托业考试必备 ? I ve looked up the words:


托 = to entrust (only one possible meaning, i do not know which one makes   sense)
业 = enterprise
考试 = test
必备 = essential


I can make no sense of this sentence, i even can not analyze its parts of speeches.

Could you explain the contained in this sentence?
I do not agree with S.Rhee. It seems like here it is a name of a book or some TOEIC test preparation reference. Thus, the better translation in English would be:

Essential for TOEIC