1. polar day：极地气流 polar current | 极地气旋 polar cyclone | 极昼 polar day
1. 极昼什么意思
1. 公式COSZ=sinφ·sinδ+cosφ·cosδ·cost不仅可以用来计算正午太阳高度角和昼使长短，还可以用来求解极昼、极夜和太阳直射条件。
It is applied not only to compute the solar altitude at noon, the lengths of day and night, but to explain the phenomena of polarday and polar night, the condition of subsolar point.
2. 为什么？因为南极洲有六个月的极昼和六个月的极夜。
Why? There are six months of light and six months of darkness.
3. danci.911cha.com
3. 越接近高纬度，一年中的极昼和极夜就越长。
The more close to high latitudes, the very day of the year and will be a very long night.
4. 911查询·英语单词
4. 若想看到最美的景色，就要在日落前出发，如果是极昼期间，就要等到黄昏时分。
Outside of summer, the best time to visit is in february.
5. 欢迎来到比弗米尔斯，这个孤是立的阿拉斯加小镇迎来了它没有夜你晚的盛夏季节--极昼。
Welcome to Beaver Mills, an isolated Alaskan town celebrating its midsummer season of no night.
6. 极昼的反义词
6. 在极昼时期，巨大的冰穹24小时不停地将阳光反射回太空。
That great dome of ice reflects sunlight back into space throughout the 24 hours a day of polar summer sunshine.
7. 极昼
7. 夏季极昼时，太阳EUV辐射的电离效应使电离层电离密度比冬季值大许多，而且，日变化的最大值时间也提前了1～2h。
During the summer polar daylight, the ionized effect of the solar EUV radiation makes the ionospheric electron density much larger and the peak time of the diurnal variation of f oF 21-2 hr earlier than that in winter.
8. 极昼的近义词
8. 他来自挪威北端，成长于夏日的极昼和冬季的极夜。
Originally desending from the far north of Norway, he grew up with light nights in the summertime, and dark day in the winter.
9. 911chaxun查询·英语单词
9. 斯堪的那维亚半岛的仲夏总会引发特殊的情感共鸣，而六月中旬的极昼庆典，则往往在群岛安静的小海湾中举行。
Midsummer has a special resonance in Scandinavia, and the celebrations of 24 hours of sunlight, which fall in mid-June, traditionally take place in the quiet coves of the archipelago.
10. 极昼时段，这里二十四小时阳光普照，风景宜人；隆冬时节，整个城市银装素裹，美不胜收。
The city center almost feels like one massive museum and is equally beautiful under the24-hour light of the " White Nights " period or covered deep in snow in the depths of winter.
11. 在平日较为保守的芬兰人看来，没有什么方式比举办这些新奇有趣的比赛来欢度他们短暂的极昼夏日时光更为美妙了。
Normally reserved Finns say there is no better way to celebrate the short summer months than with contests that add a jolt of adrenaline and silliness to bright summer nights.
12. \u0064\u0061\u006E\u0063\u0069\u002E\u0039\u0031\u0031\u0063\u0068\u0061\u002E\u0063\u006F\u006D
12. 极昼期的实际日照占全年的72.4%，是该地区获取太阳辐射能的主要时段。
The actual sunshine time was 72.4% of the total year, and was the main period of time to obtain solar radiation energy.
13. 极昼的反义词
13. 极昼时段，这里二十四小时阳光普照，风景宜人；隆冬时节，整个城市银装素裹，美不胜收。
The city center almost feels like one massive museum and is equally beautiful under the24-hour light of the " White Nights " period or covered deep in snow in the depths of winter.
14. 极昼的翻译
14. 极昼期的实际日照占全年的72.4%，是该地区获取太阳辐射能的主要时段。
The actual sunshine time was 72.4 % of the total year, and was the main period of time to obtain solar radiation energy.
15. 夏季极昼时，太阳EUV辐射的电离效应使电离层电离密度比冬季值大许多，而且，日变化的最大值时间也提前了1～2h。
During the summer polar daylight, the ionized effect of the solar EUV radiation makes the ionospheric electron density much larger and the peak time of the diurnal variation of f oF 2 1-2 hr earlier than that in winter.