an area in a field of crops where the crops have been made flat in a regular pattern, often a circle or series of circles, which people sometimes believe has been done by aliens (= creatures from a different planet)

The picture shows him standing in a mysterious 15-foot-wide crop circle in his soybean field. 这张照片显示他站在自己大豆田间一个15英尺宽的神秘麦田怪圈里。

A crop circle expert who spent three days studying those circles concluded they were caused by some unexplained natural phenomenon. 一位麦田怪圈专家花了三天时间研究这些圆圈后得出结论，它们是由一些无法解释的自然现象造成的。