The main course was swimming in oil.

主菜油汪汪的。

The new textbook is in course of preparation.

新的教科书正在准备之中。

Similarly in course development.

课程开发也类似。

This is similar in course development.

这与课程开发是类似的。

Again, this is similar in course development.

这一点也与课程开发相似。