Scientists at the Leibniz Institute of Atmospheric Physics use Lidar lasers to measure the stratosphere and mesophere
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This decision seems to be one of the more hotly-contested among ergo enthusiasts. A conventional keyboard has staggered keys, with each row slightly offset to the rows above and below it — so the A key is about halfway between the Q and W above it. This is a holdover from vintage mechanical typewriters, in which each press activated a hammer that smashed ink onto paper in the shape of a letter. To fit the hammers as close together as possible, while still allowing for finger pads, the keys were staggered.。快连下载安装对此有专业解读
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Not the day you're after? Here's the solution to yesterday's Connections.