[译] 月球绕地球旋转，地球绕太阳旋转。
[误] Moon goes round earth，and earth goes round sun.
[正] The moon goes round the earth，and the earth goes round the sun.
[注] 表示世间独一无二的事物须加定冠词。又如：The flight to the moon is of special interest. 飞往月球特别令人神往。earth 作“世界”解时不加冠词，如：on earth 在世界上，例如：Most bacteria are not only harmless to man but absolutely essential to the continuation of all life on earth. 大多数细菌不仅无害于人类，而且对世界上一切生命的延续是绝对不可少的。
