从他的听众和分析报告中，他了解到，只有2到3个同学对地质学涉猎较深。
From his audience and analysis, he learned that only 2 or 3 of his classmates knew much of anything about geology.
它们是根据他从天气状况的电报报告中绘制的天气图绘制的。
They were based on weather maps he drew from telegraphed reports of weather conditions.
你从他脸上的表情可以看出，信里除了报告成绩和学自行车的事还有别的。
You can see from the expression on his face that there were other things in the letter besides report CARDS and velocipedes.
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