arced怎么发音

arced怎么发音 -
[ɑ:kt]
3.A rainbow arced gracefully over the town.彩虹在小城上空画出了一道优美的弧线。4.A rainbow arched across the sky.一道彩虹横跨天际。5.In a rainbow,the colours pass into one another.虹的色彩互相变来变去。