study做研究講可數嗎

例句：

It is important to develop good study skills.

培養良好的學習方法很重要。

We will study the report carefully before making a decision.

我們將認真研究這份報告，然後再作決定。

His face was a study in concentration.

他臉上完全是一副全神貫注的表情。

Physiology is the study of how living things work.

生理學是研究生物功能的學科。

This study represents a major expenditure of time and effort.

這項研究意味着要耗費大量的時間和精力。