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山:那是女人看的电影。
Sa: : Here let me get you... She 's got cable... come on.
山:来,让我帮你……她有有线电视……来吧。
Sa: She 's not going to see right through that?
山:她不会马上看穿我吧?
sa So we have 1 s a, and we're drawing this as having a positive amplitude, but since we have destructive interference we're going to draw 1 s b as having the opposite sign, so we have a plus and a minus in terms of signs.
我们有,我们把这画成一个正的振幅,但因为我们是相消干涉,我们把1sb画成相反的符号,所以我们有一正一负两个符号。
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