Refringency
折射系数
🗣️ 情景例句
I have lots of hobbies. I love to stay busy.
我有很多爱好，我喜欢让自己忙着。
I hope you can consider my offer.
我希望你能考虑我的建议。
It's always hot in June, July and August.The sun shines every day.
6月、7月和8月的天气总是炎热的，每天都出太阳。