zhè / liǎng / gè / xiàng / liàng / shì / zhèng / jiāo / de / kě / yǐ / yòng / lái / jiǎn / huà / jì / suàn / 。这两个向量是正交的,可以用来简化计算。These two vectors are orthogonal, which can be used to simplify calculations.