If you cover one of your eyes, you can't even jump into your target boat. With only one eye, you may regard three meters as one meter, thus you will fall into the sea before you rob the boat.

如果你把一只眼睛捂住的话，你甚至都跳不到要打劫的船上，因为三米远的距离在你一只眼看来也许只有一米远，那样你会跳进大海中。

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LB series of target-Meter is the traditional target flowmeter measurement principle on the basis of existing digital processing technology.

LB系列靶式流量计是在传统靶式流量计测量原理的基础上结合现有的数字处理技术。

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Target Flow Meter.

靶式流量计。

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Its prime target is the 18, 000-foot (5, 500-meter) peak at the center of Gale Crater, Mount Sharp, where scientists hope to get a layer-by-layer look at the history of the planet.

CNN: Mars rover captures nearby rocket 'footprint'

The rover's mission is to determine whether Mars ever had an environment capable of supporting life, and its prime target is Mount Sharp, the 18, 000-foot (5, 500-meter) peak about 12 kilometers (7.5 miles) to the south.

CNN: Mars panorama shows Curiosity's prime target