在学术层面上，择时交易受到那些相信有效市场理论的人质疑。
At the academic level, the very concept of market timing is called into question by those who believe in the efficient market theory.
这个培训项目在学术和实践两个层面上都适当地强化了当地官员们的能力。
This education program will benefit local officials and staff by combining both the academic and practical aspects of proper economic development techniques.
应用推荐