polar region 托福

It's very cold in the polar regions.

南北是很寒冷的。

The polar region is the habitat of the polar bear.

北为北熊的栖息。

Results Nerve endings of muscle spindle in equatorial and polar regions were dyed black;intrafusal fibers were dyed buffy.

结果肌梭赤道部与两部神经末梢呈棕黑色，清晰可见，梭内肌纤维染为棕黄色。

Thermokarst failures occur when permafrost—a layer of frozen soil in Earth's polar regions—thaws and becomes unstable, possibly releasing greenhouse gases into the atmosphere.

随着永久冻消溶和分崩离析，热喀斯特现象大量出现，埋藏于的（甲烷等）温室气体可能散发到大气中。

: In polar region, apart from the bright stars seen under moon night, ever changing aurorae are making scenes after scenes of celestial display in the darkness.

在北圈范围，月了能够看到天上明亮的星外，变幻莫测的光往往在�上著演一幕又一幕的天文表演。