The University of Maryland Cooperative Extension explains that forest landowners can grow ginseng using two different methods.

VOA: special.2009.04.07

By extension we have our attempt as readers to arrive at an understanding of the first two books in general.

延伸开来，我们作为作者，试图,达成对这两卷书的大体上的理解。

耶鲁公开课 - 弥尔顿课程节选

By extension we have our attempt as readers to arrive at an understanding of the first two books in general.

延伸开来，我们作为作者，试图,达成对这两卷书的大体上的理解。

耶鲁公开课 - 弥尔顿课程节选