Driving at high speed, one may well miss direction signs.
如果开车速度很快,很有可能看不到方向标志。
When programming with incremental value, in radial direction, the displacement of two times the actual value, and the enclosed said direction signs (omit the positive).
用增量值编程时,以径向实际位移量的二倍值表示,并附上方向符号(正向可以省略)。
The particular app in question is a subway route finder that shows route signs when you point your phone one direction or another.
这里所提到的应用是一款地铁路线查询器,当你将手机指向一个方向时,它就会显示出路线标志。
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