Refringency
折射系数
🗣️ 情景例句
So you really don't see your way to get it down a bit?
你真的不能再降一点了吗？
Mr. Jones is a renowned international authority on the problem of overpopulation in developing countries.
琼斯先生在发展中国家人口过剩问题方面是声誉卓著的国际权威。
Oh dear! What shall I do?
哎呀！我怎么办呢？