1. I'd better put on my Polar Cap so I don't freeze my ears. 为了不冻着耳朵，我最好戴上我的极帽。
2. Earth will become a desert planet, with at most a shrunken polar cap and only traces of precious liquid. 地球将会变成沙漠般的行星，最多还有个缩小的极帽和从前液体留下的遗迹。
3. A major new discovery has been that the layer of dry ice that covers much of the south polar cap is being eroded away at a high rate. 一项重大的新发现是，大范围覆盖南极极冠的乾冰层正受到快速的侵蚀。
网络释义
polar cap 极帽;
极冰帽;
极地冰冠,极盖,极帽;
极顶风;
polar ice cap 极地冰冠;
极地冰貌;
polar-cap ice 极地冰;
极冠冰;
polar cap absorption 极冠吸收;
极冠吸收极冠吸收;
极帽吸收;
极冠[游离层]吸收;
