数学老师手里拿着一本书走进了教室。
The maths teacher walked into the classroom, with the book in hand.
他整晚都在教室里做一道数学题。
He had spent the entire night in the classroom working on a mathematics puzzle.
在第一个试验中，大多数学生都选择“还是懒一懒吧”，把他们的问卷就投在了就在教室外面的投放点。
In the first experiment, a majority of participants chose to be idle and dropped their papers at the location just outside the room.
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