单词：principal airway beacon
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beacon, ['bi:kən] n 灯塔（位于海岸，用以导航）；烽火（警告敌人的接近） 【例】Fires beaconed the darkness 火光驱散了黑暗。 【记】bea＝bead珠子，夜明珠，con＝can能。夜明珠能在晚上导航。 烽火
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Grammar Girl here. Today were going to recall that the principal is indeed your pal, but well also see that a principal can be so much more. In this episode well talk about the various ways to use principlethats p-l-eand principalthats p-a-l. (These
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This is Scientific American's 60-Second Science. I'm Adam Hinterthuer. Got a minute? Man-made light sources can really throw animals for a loop. Moths can't tear themselves away from lightbulbs, and newly hatched sea turtles often shun moonlit ocean
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[00:00.00]The reason the person isn't breathing [00:04.00]may simply be that the airway is blocked [00:06.53]they've swallowed their tongue, [00:08.05]as you might say and so very often [00:10.88]all that's needed is to open up the airway. [00:14.21]
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Why Don't Snorers Wake Themselves Up? Anyone who's ever slept in the same room as a loud snorer knows how infuriating it is to have to suffer through all that noise while the offending party remains blissfully oblivious and asleep. Loud snorers can w
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Estimating crossing LV NDB 1123. 402. 预计1123飞越LV NDB台。 Passing POU at 43, maintaining FL310, estimating MLT at 55, next NLD. 403. 当前位置POU，时间43分，高度310，预计MLT55分，下一位置NLD。 BKM 47, FL170 descending to
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