“first light”的概念、定义、翻译、参考文献-科学参考

单词	first light
释义	first light [¦fǝrst `līt] ^NAVIGATION The beginning of morning nautical twilight, that is, when the center of the morning sun is 12° below the horizon.
随便看	Joy longwall loading machine Joy microdyne Joy miner joystick Joy-Sullivan hydrodrill rig Joy transloader Joy walking miner JP-4 JP-5 J particle jpd J scan J scope J-shaped distribution judgment sample Judson powder jugal Jugatae jugate Juglandaceae Juglandales jugular jugular compression jugular foramen jugular foramen syndrome

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