世界上除了有北极、南极，还有第三极：世界的高极——青藏高原。 第三极并不仅仅指珠穆朗玛峰，而是指的是青藏高原。
环渤海地区是我国经济增长的第三极。
Littoral cities are the most developed regions in economy in our country.
“第三极”对地球的气候平衡非常重要。
The third pole is really important to the balance of climate on earth.
可可西里气候 严酷，自然条件恶劣，被誉为“世界第三极”。
Hoh Xil harsh climate, poor natural conditions, known as "the world's third pole."
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