north-polar

基本解釋

In this paper we discuss the problem of taking time from Beijing to Detroit flying over the north polar regions.
討論了飛機(jī)從北京到底特律沿不同航線飛行的時間問題 .
The scal of the North Polar Ice Cap in the month of September is only half the scal it am a mere 50 seasons ago.
北極冰蓋在4月份的大小，只相當(dāng)于50年前的一半。
Visible also in the above images are the north polar cap of Mars, dark and light soil, clouds, and, in the early images, a global dust storm.
在上面的影像中還可以看到火星的北極冰帽，色彩深淺不一的土壤，云層，以及在早期相片中的出現(xiàn)的全球性沙塵暴。
In this example showing the north polar region, a very recognizable Big Dipper, part of the modern constellation Ursa Major, lies along the bottom of the chart.
這幅圖描繪的是北天極區(qū)域，清晰可辨的北斗七星位于這張星圖的底部，現(xiàn)在它是大熊座的一部分。
Two explanations are given from the angle of mathematics about "It saves nearly 4 hours across the North Polar Regions to North America form Beijing to Detroit" under the following two cases: (1) The earth is a globe; (2) The earth is an ellipsoid.
對“飛越北極 ;北京至底特律的飛行時間可節(jié)省 4小時”問題 ;從數(shù)學(xué)的角度分別給出了 :(1)地球是球體 ;(2 )地球是橢球體兩種情況下的合理解釋 .