If you don't put a point but just put a number, this specifies the width of space that will be used by the number you're inserting there.
如果你不用一个点，而只是放一个数字，这指定了你插入的数字所使用的空间宽度。
2
The South Pole would be the check point on circuit, snatching the data from space, processing them in computers and relaying them to the rest of the world.
南极将是轨迹的检查点，从太空中获取数据，用电脑处理，然后将数据传送到世界其他地方。
3
Water ice could enable the creation of a self-sustaining moon base someday, a mining camp perhaps, or a departure point for further space exploration.