“boundary marker”的概念、定义、翻译、参考文献-科学参考

单词	boundary marker
释义	boundary marker [`bau̇n·drē ´mär·kǝr] ^NAVIGATION A radio transmitter operating at 75 megahertz and installed near the approach end of landing runway (3.9 nautical miles ± 1000 feet, or 7123 ± 305 meters) and approximately on the localizer course line.
随便看	snout snow snow accumulation snow avalanche snowbank glacier snow banner snow barchan snow bin snow blindness snow blink snow blower snowbreak snowbridge snow cap snow climate snow cloud snow concrete snow course snow cover snow-cover chart snowcreep snowcrete snow crust snow crystal snow cushion

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