polar region 托福

1.It's very cold in the polar regions.

南北极地带是很寒冷的。

2.The polar region is the habitat of the polar bear.

北极地带为北极熊的栖息地。

3.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极部神经末梢呈棕黑，清晰可见，梭内肌纤维染为棕黄。

4.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.

永久冻带消溶离析，热喀斯特现象大量出现，埋藏于地下的（甲烷等）温室气体可能散发到大气中。

5.: 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.

在北极圈范围，月夜下除了能够看到天上明亮的星外，变幻莫测的极光往往在夜�上著演一幕又一幕的天文表演。