科学家正在研究这种新型材料的特性。

Scientists are studying the properties of this new ___material.

这门课程的教材涵盖了广泛的学习材料。

The textbook for this course covers a wide range of ___material.

这次考试涵盖了本学期所有的课程内容。

The exam covers all the ___material we studied this semester.