Rayl
n. [物]瑞利(比声阻抗的单位)
🗣️ 情景例句
Have you been waiting for me for a long time?
你已经等我很久了吗？
Aren't they students?
他们不是学生吗？
The man went to great lengths to prove that the diamonds were real.
那人竭力想证明那钻石是真货。