rim
/rɪm; rɪm/ n
1 edge or border of sth that is (approximately) circular 圆形（或近似圆形）物体的边缘
the rim of a cup, bowl, etc 杯、 碗等的边
a pair of spectacles with gold rims 一副金框眼镜.
2 outer edge of a wheel, on which the tyre is fitted （安装轮胎的）辋圈, 轮圈. =>illus at App 1 见附录 1 插图, page xiii. rim, v (-mm-) [Tn]
provide (sth) with a rim; be a rim for (sth) 给（某物）镶边; 形成（某物）的边缘
Mountains rimmed the valley. 群山环绕著这个山谷.