The purpose of intelligence is to provide information on how the enemy can be beaten
谍报的`目的是提供如何打败敌人的信息。
The main purpose of industry is to create wealth.
工业的主要宗旨是创造财富。
One has to ask oneself what the purpose of the exercise is.
大家必须问一问自己，这个锻炼的目的是什么。
The purpose of the book is to provide a complete guide to the university.
本书旨在全面介绍这所大学。
The purpose of the journey is to mobilise public opinion on the controversial issue
此行的目的就是动员公众对这个备受争议的问题发表意见。