1、These are source materials referring to cattle breeding.
這些就是有關家畜飼養(yǎng)的資料。

2、The source materials need to be approved by the instructor before the paper is written.
所查閱的材料在寫報告前需要經(jīng)過導師許可。

3、The source materials for the original course did not include lab exercises or assessments.
原來的課程材料不包含實驗練習或測驗。

4、Next, they try to read a variety of source materials - everything written by or about the subject.
其次，歷史學家們會去閱讀各種各樣的資料——不管是當事人寫的還是別人寫的。

5、Source materials referring to cattle breeding
有關家畜飼養(yǎng)的資料