Liao Yuan felt time slow down as he watched the ball arc through the air, coming towards him.

看着球在空中划出一道弧线，朝自己飞来，廖远感觉时间都变慢了。

The field starts at the sun and then curves out in this graceful arc through the solar system.

林恩：磁场从太阳开始，然后以优美的弧线穿过太阳系。

High voltage  electricity is not only extremely dangerous, but it also tends to arc through the air (which is not  a great insulator) to the other phases or grounded objects.

高压电不仅极其危险，而且还容易通过空气（不是很好的绝缘体）产生电弧到达其他相或接地物体。