利用此结论，可以知道，随着灯丝的变长，亮带不断外推，从而在测试屏幕上形成连续的亮区，这比较清楚地解释了测试屏幕上桃形亮区的形成机理。
Therefore, along with the increasing of the filament length, the corresponding bight zone becomes larger and larger, and a continuously peach-form bright area can be formed on the test screen.
本文采用两种方法来解决高温温区的外推标定问题，即基于二次曲线的导数最小二乘法和基于修正指数模型的趋势外推法。
One is differential least square method based on conic, and the other method is trend extrapolation based on modified exponential model.
应用推荐