粉红蚕宝宝
2021年【早起计划】第240天Amazing China: Perpetually White Mountains Located in the northeast of China, the Changbai Mountains is named after its iconic scenery of being perpetually white almost all year long. These mountains were formed around 2.77 million years ago, after volcano eruptions due to the movement of the earth crust. At the top of the main mountain there is a crater lake with an altitude of 2,100 meters. It is called “Tian-Chi” in Chinese, literally meaning heaven lake. Its latest eruption happened around 300 years ago. Tianchi is the largest crater lake in China, and it is the deepest mountain lake around the world as well. The average depth of water is 204 meters. It has stored over 2 billion tons of fresh water, which is able to supply the population in Beijing downtown for 22 months. The winter lasts for 9 months in the Changbai Mountains. Thus, the crest of the mountain is covered by snow most of the time. The depth of the snow is 50 centimeters on average.thus:因此,所以 来自古英语 thus, 因此,如此,指示代词,词源 同 this。 来自 this 的拼写变体,并产生词义和用法上的差别。
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