tōngguò / gǎibiàn / cíchǎng / qiángdù / kěyǐ / zēngdà / huò / jiǎnxiǎo / cítōngliàng

通过改变磁场强度，可以增大或减小磁通量。

By changing the magnetic field strength, the magnetic flux can be increased or decreased.