Rf
射频, 测距计, 测远仪\\n[计] 射频
🗣️ 情景例句
I have to turn off the lights,
我得关掉灯，
The buyer has the right to cancel the contract unilaterally if the seller fails to ship the goods within the L/C validity.
如果卖方不能在信用证有效期内交货的话，买方有权单方面取消合同。
Oh, I'm sorry to hear that.
噢，真遗憾。