“弧”造句

通常的实验室光源选用汞弧灯.
A common laboratory source of light is provided by a mercury arc.

不很精确的射电干涉仪观测表明,这个源的角径约为1.5弧秒.
Comparatively rudimentary interferometer observations suggested that this source is about 1.5 across.

单个弧是不能求长的.
The individual arcs cannot be rectified.

• #弧