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把一张厚纸弯成拱形,放在桌面上。向纸下的空隙猛吹一口气,你一定认为,纸就轻易地翻了过去。实际情况正相反,纸却紧贴在桌上了。
Curl a piece of thick paper and put it on the table. Blow to the gap under the paper, you must think, the paper easily turned over. The actual situation is the opposite, the paper is clinging to the table.