例句與用法

1. Such deviated light ( as you will subsequently learn , called diffracted light ) is rendered one - half wavelength or 180 degrees out of step ( more commonly , out of phase ) with the direct light that has passed through undeviated
   這種偏移光（其后我們稱之為衍射光）與直射光之間呈現(xiàn)半個波長或180的不同步（一般稱之為不同相位） 。