It turns out that the diameter is actually 2.5 centimeters.

它的直径实际上是 2.5 厘米。

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Dr Chatterjee therefore suggests that an object 40km in diameter hit the Earth off the coast of India and forced vast quantities of lava out of the Deccan Traps.

因此，查特基博士认为，一个直径40千米的物体在印度海岸撞击地球，造成德干地盾喷发大量熔岩。

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The object involved, which was likely only a few dozen meters in diameter, could have wiped out a major metropolitan area.

这些天体也许直径只有几十米，但足以摧毁一座大都市。

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That changed in the mid-1980s, when microscopic sieves--spread throughout steel tubes 30 feet long and 4 to 5 inches in diameter--were developed to filter out undesirable elements before the whey is dried to a powder for use in food manufacturing.

FORBES: Making Whey

That changed in the mid-1980s, when microscopic sieves--spread throughout steel tubes that are 10 meters long and 10 to 12 centimeters in diameter--were developed to filter out undesirable elements before the whey was dried to a powder for use in food manufacturing.

FORBES: Making Whey

Forty-two radio dishes, each 20 feet in diameter, were powered up on Oct. 11, to scope out galaxies, black holes, and--maybe, just maybe--alien civilizations.

FORBES: Magazine Article