If you have ever taken a magnifying glass and let the sun's rays play through it on some object, you know that as long as the rays were scattered they accomplished nothing.
On an empty area in the eastern region of Wushan town, the warmth of the rays of the morning sun passed through the surrounding trees, leaving behind scattered spots of light on the empty ground.
乌山镇东边的空地上，早晨温热的阳光透过空地旁边的大树，在空地上留下了斑驳的光点。
3
Solve the problems existing in the sample of thin film with special shape by using the method of comparing fluorescence X-rays with scattered X-rays and practice the method in FP.