... 距离差位置线 position line by distance difference 距离灯[导标]；后桅灯；导航灯 range light 距离定位 fixing by distances ...
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照相机有一个 LED 闪光灯，在夜晚照近距离相片时很有用，但是，照相机本身迟缓，对焦和拍照都比较慢。
The camera has an LED flash, which helps at close range at night, but the camera itself is balky and slow to focus and fire.
我之前用过这样的工作灯，它距离你很近时发出的光是很微弱的，但是在距离你一臂之长的距离时，它会发出很强的光，这样就会使得你的工作顺利进展。
I have used such lights before, which merely light what is just in front of you, but anything at arm's length is fairly well illuminated and progress can be made easily enough.
如果要驶入的车道车流量很大，你应当在获得安全距离换车道前就打开转向灯。
If traffic in the lane you are moving into is heavy, you may turn on your signal before there is enough space to change lanes.
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