Calculating this angle would allow astronomers to measure what was then the ultimate goal: the distance of the Earth from the Sun.

计算这个角度可以让天文学家测量地球到太阳的距离，这是当时的终极目标。

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The earth's not always the same distance from the sun, and it's not always tilting toward the sun at the same angle.

地球到太阳的距离并不总是相同的，地球也并不总是以相同的角度倾斜向太阳。

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As Venus was closer to the Earth, its parallax angle would be larger, and Halley worked out that by using Venus it would be possible to measure the Suns distance to 1 part in 500.

由于金星离地球更近，所以它的视差角会更大。哈雷计算出，利用金星可以测量出太阳与地球之间的距离，误差为五百分之一。

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The 24-inch LCD monitor uses a built-in CMOS sensor to determine your distance from the screen and your neck angle while sitting.

CNN: Computer monitor uses sensor to promote better posture

The brain gets disoriented trying to reconcile the difference between the distance to the image and the foreshortened viewing angle.

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The device saves all the data from each hit, namely the animation, path, putter-face angle at impact and throughout the stroke, angle of attack, tempo, impact speed and swing path distance -- in other words, more information than most players would know what to do with.

ENGADGET: 3BaysGSA Putt: a Bluetooth golf gadget that puts eyes in your putter (hands on)