concave rim 中文意思是什麼
concave rim
解釋
凹形輪輞-
Some are flared ? that is, thicker at the rim than in the center, like a concave lens
有些呈喇叭形即邊緣較中心厚,類似凹透鏡。 -
It is a sloping green valley, concave in shape, its upper rim coming in direct contact with a series of enormously high cliffs that rise almost vertically
這是一處傾斜的綠色山谷,呈凹形,山谷上緣直接連接連綿的、高不可攀、近乎垂直的懸崖。
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