The spatial resolution of system can be measured directly or evaluated indirectly by the half width of the Fresnel reflection at the end of the fiber.
系统的空间分辨率既可以直接测量，也可以通过测量光纤末端菲涅尔反射的半宽度来间接测量。
I shelter under the stone arch of the road bridge for half an hour's quiet reflection.
我躲在公路桥的石拱下静静思考了半个小时。
In other words, the wave has gained (or lost) half a wavelength in the process of reflection.
换句话说，在反射过程中光波已获得(或损失)半个波长。
In other words, the wave has gained (or lost) half a wavelength in the process of reflection.
换句话说，在反射过程中光波已获得(或损失)半个波长。
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