An eight-week-old embryo is only an inch long.

一个8周大的胎儿仅1英寸长。

《柯林斯英汉双解大词典》

Light takes seven microseconds to cross a sample only eight thousandths of an inch long; in the vacuum of space, light would go more than a mile in the same time.

光穿过只有八千分之一英寸长的试样需要七微秒，而在空间真空中，光在同样长的时间内可能会行驶一英里多。

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While the patient is still on the operating table, a lead disc is slipped behind the breast tissue to protect the chest cavity, and an eight inch wide electron beam focused directly on the area surrounding the tumour.

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"I've had six cortisone injections, two operations and have got an eight-inch scar down my leg, " said Tudor.

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But an eight-inch wafer has a surface area of over 50 square inches (A four-inch radius squared times Pi).

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