studied是什么意思？

He studied the designs of various choices.

Before she went to Brazil, she studied Portuguese for three months.

Kao said she cautions against forming any generalizations based on any one of the studies, noting that more background characteristics of the students need to be studied and explained.

A chronicle professor, Henry Louis Gates, recently studied are search project looking into 19th century African-American fiction and poetry.

But Schweitzer contends the "mounting causal evidence" linking goal-setting and harmful behavior should be studied to help spotlight issues that merit caution and further investigation.

Russell Fazio, an Ohio State psychology professor who has studied interracial roommates there and at Indiana University, discovered an intriguing academic effect.