| 单词 | 指向标 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔compass〕Interest rates serve as a compass for determining whether to buy or sell stocks.利率是决定股票买卖的指向标。韦氏高阶〔radio beacon〕A fixed radio transmitter that broadcasts distinctive signals as a navigational aid.无线电指向标：位置固定的无线电发射台，可以发出清晰的无线电讯号用以导航美国传统〔radio beam〕A focused beam of radio signals transmitted by a radio beacon to guide aircraft or ships.无线电射束：无线电指向标发出的一束无线电讯号给飞机或轮船导航美国传统 |
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