Rdf
无线电测向器, 无线电定向仪, 无线电探问, 无线电测向
🗣️ 情景例句
We'll open a letter of credit if you promise to effect shipment one month earlier.
如果你方答应提前一个月交货，我们就同意开信用证。
I have so much to do after I retire.
我在退休后有许多事要做。
Train compartments soon get cramped and stuffy.
车厢很快就变得拥挤、闷热，