An astronomer, a physicist and a mathematician were holidaying in Scotland. Glancing from a train window, they observed a black sheep in the middle of a field.
一个天文学家，一个物理学家和一个数学家到苏格兰去度假。透过火车车窗，他们看到一个牧场里有一只黑色的羊。
Glancing from a train window, they observed a black sheep in the middle of a field.
透过火车车窗，他们看到一个牧场里有一只黑色的羊。
Glancing from a train window, they observed a black sheep in the middle of a field.
透过火车车窗，他们看到一个牧场里有一只黑色的羊。
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