This number is approaching 90,000 for Amazon’s data centres on America’s East Coast alone (see chart).
仅美国东海岸一处，这一数字就接近9万个。
The transformation on mathematical basis of modern historic chart, the correction of the horizontal coordinate and depth data on the charts for the waters off Zhejiang coast are elaborated.
近代历史海图数学基础的转换；浙江海区近代历史海图的平面坐标改正和深度基准面改正。
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