在今后相当长的时期内，煤炭还将是中国的主要能源。

Within quite long period in the future, the coal will be also the main energy of China.

youdao

这就使得他在相当长的时期内，不可能避免地创造出许多拙劣的作品。

This makes it impossible for him to avoid the creation of a great deal of rubbish during a considerable length of time.

youdao

在过去相当长的时期里，由于诸多原因，贫困一直困扰着中国。

For quite a long time in the past, China was bedeviled by poverty, for various reasons.

youdao

Now, we're going to go back to Roger Ibbotson at the School of Management. He did some path breaking work in terms of describing capital markets returns over reasonably long periods of time.

先讲回到管理学院的罗格·伊博森,所进行的开创性研究,描述了在相当长的时期内,资本市场的收益情况

耶鲁公开课 - 金融市场课程节选