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
Do you know the phone number of the restaurant?
知道那家餐厅的电话号码吗
One good turn deserves another.
以德报德。
but few us have had the opportunity to find out.
但很少有人能有机会去弄个究竟。