swept circle的意思|示意

The launch slowed down as it swept round in a wide circle at the river's mouth, then headed back up the river towards Shanghai.

小火轮改开了慢车，迂回地转着一个大圆圈，这是在调头预备回上海。

Then he stood still, close to the trunk of the nearest tree, as a truck came round the circle and swept its lights over him.

然后他静立着，靠近最近那棵树的树干，当时一辆卡车在这转弯，灯光扫过他全身。