arcing

常見(jiàn)例句

The sun appears to move in an arc across the sky.
太陽(yáng)看起來(lái)在天空以弧線運(yùn)行。
An early instrument for measuring altitude of celestial bodies, consisting of a90= graduated arc with a movable radius for measuring angles.
象限儀用來(lái)測(cè)量天體緯度的一種早期工具，由一個(gè)有90度刻度的圓弧和一個(gè)用來(lái)測(cè)量角度的可移動(dòng)的半徑構(gòu)成