Hit Caps lock. If you don't want to see the edges of the brush you can switch to precise mode easily by having Caps lock on.
如果你不想在用笔刷时看到它的轮廓，按下大写锁就能轻松转将画笔的光标换到精确模式。
Because the current system is less precise, controllers need to give planes plenty of room as they lock onto the runway, descending in a slow, stepped approach.
因为现今的系统不够精确，飞机锁定跑道、一步步缓慢下降的过程中，空中交管员必须给飞机留有余地。
The AE lock mode locks the exposure value for precise exposure metering.
自动曝光锁定模式能锁定精确曝光测定时的曝光值。
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