In comparison with the previous study, the new study expanded research subjects.

与之前的研究相比，这个新的研究拓宽了研究主题。

Hence the age of the research subjects.

这段时期是研究者的研究课题。

Disaster literature is a very literary value of research subjects.

灾难文学是一个十分具有研究价值的文学题材。

The research subjects include clean coal, fluid mechanics and biofuels.

已确定的课题包括清洁煤、液压动力学和生物燃料。

Psychological structures of morality is one of the important research subjects.

品德心理结构是品德心理研究的重要课题。