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1·You know that old saw about a plane flying from California to Hawaii being off course 99% of the time-but constantly correcting?

你知道吗，那些老人认为从加利福尼亚飞往夏威夷的飞机坠落的几率为99%——但是他们是对的吗？

2·Summarize the focal property and aberration correcting ability of VLS plane grating.

对平面变栅距光栅的聚焦特性和像差校正原理进行了较全面的综述。