Rais
abbr. 辐射源监管信息系统；红外反射-吸收光谱学（Reflection-Absorption Infrared Spectroscopy）
🗣️ 情景例句
There's always a friend around when you need one.
当你需要朋友帮忙的时候，总会有朋友在你身边的。
I took 2 pounds of fish.
我拿了两磅鱼。
That's a problem we Chinese must pay special attention to.
这是我们中国人必须特别注意的问题。