钮扣应该被移动或变灰色出吗?
因为城市水治疗程序有在河中已经移动细菌出现或者使水变灰色,所以这是,减少新鲜的空气要求。
This is because the city water treatment process has already removed the bacteria present in river or gray water, which reduces the ozone demand.
被以它的婴儿潮闻名的柏林邻近地区揭露在一个国家中,和使人口变灰色,宝物追捕时常在失望方面结束。
A Berlin neighborhood known for its baby boom reveals that in a nation with a graying population, treasure hunts often end in disappointment.
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