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N-COUNT
				弧形;弧线
				An arc is a smoothly curving line or movement.
例句
						The Aleutian chain is a long arc of islands in the North Pacific.
						阿留申群岛是北太平洋上一长串呈弧形排列的小岛。 
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N-COUNT
				弧
				In geometry, an arc is a part of the line that forms the outside of a circle.
 
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VERB
				成弧线;呈弧形
				If something arcs in a particular direction, it makes a smoothly curving line or movement.
例句
						A rainbow arced gracefully over the town.
						彩虹在小城上空画出了一道优美的弧线。