Just as iron filings arc from one end of a magnet to another, the plasma is sliding in an arc along magnetic field lines.
等离子体在弧形内沿着磁力线滑动,和铁屑在磁体两极之间呈现的弧形一样。
2
Yellowstone is at the northeastern end of the Snake River Plain, a great U-shaped arc through the mountains that extends from Boise, Idaho some 400 miles (640 km) to the west.