The General Social Survey data also show some encouraging trends, said John P. Robinson, professor of sociology and director of the Americans' Use of Time project at the University of Maryland.
“综合社会调查”数据也显示出了某种积极的趋向，JohnP .Robinson，马里兰大学美国人时间工程主任和社会学教授表示。
The General Social Survey data also show some encouraging trends, said John P. Robinson, professor of sociology and director of the Americans' Use of Time project at the University of Maryland.
“综合社会调查”数据也显示出了某种积极的趋向，JohnP .Robinson，马里兰大学美国人时间工程主任和社会学教授表示。
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