Rdf
無(wú)線電測(cè)向器, 無(wú)線電定向儀, 無(wú)線電探問(wèn), 無(wú)線電測(cè)向
??? 情景例句
We'll open a letter of credit if you promise to effect shipment one month earlier.
如果你方答應(yīng)提前一個(gè)月交貨，我們就同意開(kāi)信用證。
I have so much to do after I retire.
我在退休后有許多事要做。
Train compartments soon get cramped and stuffy.
車廂很快就變得擁擠、悶熱，