我们需要多大直径的金属丝？
它的直径是地球直径的53%。
它主要由一钢制长方体和固定在其两端的两个相同直径的钢制圆柱体组成。
It is mainly composed of a steel rectangular parallelepiped and two steel cylinders of the same diameter fixed at its two ends.
为了评估最大横向直径和平均直径的测量值会影响曼托试验的结果。
The objective is to evaluate that the measures of the largest transverse diameter and of average diameter affect the results of Mantoux test.
你也许会问，为什么不给出直径的？
You may ask me, Why didn't you give us the error in the diameter?
所以，一个60毫米直径的卵石。
这个弧形比太阳系直径的65倍还要大。
This arc is 65 times larger than the diameter of our solar system.
pai是一个数学常量，代表圆周长跟直径的比值。
It's a mathematical constant representing the ratio of any circle's circumference to its diameter.
一般来说，这个洞的直径大约为南瓜直径的三分之二左右。
Generally, the size of the hole should be about two-thirds the diameter of the pumpkin.
银河系120000光年直径的主盘使它的其余部分相形见绌。
Spanning 120,000 light years, our galaxy's disc outshines the rest of the Milky Way.
银河系120000光年直径的主盘使它的其余部分相形见绌。
Spanning 120, 000 light years, our galaxy's disc outshines the rest of the Milky Way.
500英尺直径的小行星可能毁灭整个大都市，或引发大规模海啸。
An asteroid 500 feet across could destroy a metropolitan area or spawn massive tsunamis.
一颗约六英里直径的陨石，被认为是造成恐龙物种灭绝的罪魁祸首。
One, about six miles across, is thought to have wiped out the dinosaurs.
这些镶嵌的空间切片的跨度相当于一个满月直径的三分之一(10弧分)。
This Mosaic spans a slice of space that is equal to about a third of the diameter of the full moon (10 arc minutes).
大多数科学家相信一颗6英里直径的小行星在6500万年前使恐龙灭绝。
Most scientists believe a six-mile-wide asteroid doomed the dinosaurs 65 million years ago.
Seitz设想的是抽取更小的大约五百分之一毫米的直径的气泡放到海里。
What Seitz imagines is pumping even smaller bubbles, about one-five-hundredth of a millimeter in diameter, into the sea.
因为纳米碳管的直径仅是碳纤维直径的千分之一，它可以穿过碳纤维中的细缝。
Because these tubes are a thousandth of the diameter of carbon fibres, they can slip into the microscopic Spaces between them.
科罗- 7b是已知外部行星中最小的一个，它的直径不超过地球直径的两倍。
The smallest known exoplanet is Corot-7b, which has a diameter less than twice that of Earth.
方形光二极管阵列包括有10-、30 -、40 -或者50 -分米直径的光二极管。
The Quad PD Array consists of either 10 -, 30 -, 40 -, or 50-micron diameter photodiodes.
在树根处砍一个缺口，缺口的深度应该是树木直径的80%，其角度大约为70度。
Cut a 70-degree notch into the tree with a length of 80 percent of the trunk’s diameter.
就眼下来说，我们的供水也很充足：我们还有三根18英尺长，12英寸直径的水管装满淡水。
As of now, our own water supplies are in good shape. We still have three 18-ft long, 12-inch diameter pipes full of it.
早期的喷气式发动机进气口狭窄且噪音巨大但是随着前部风扇直径的增大发动机变得越来越安静。
Early jet engines had narrow inlets and were very noisy, but as the diameter of the fans at the front increased, the engines became quieter.
恒星的尺寸范围从仅有12英里宽(20公里)的中子星到大约1000倍太阳直径的超大恒星。
Stars range in size from neutron stars, which can be only 12 miles (20 kilometers) wide, to supergiants roughly 1,000 times the diameter of the sun.
恒星的尺寸范围从仅有12英里宽(20公里)的中子星到大约1000倍太阳直径的超大恒星。
Stars range in size from neutron stars, which can be only 12 miles (20 kilometers) wide, to supergiants roughly 1, 000 times the diameter of the sun.
就像是怕以前作用还不够似的，现在防晒霜遮阳剂包含的纳米粒子越来越多，比人类头发直径的千分之一还小。
As if that were not enough of an impact, sunscreens increasingly contain nanoparticles, smaller than one one-thousandth the diameter of a human hair.
与现行设计趋势相反，麻省的概念通过最小化发动机总体直径的尺度以及相应缩小喷气排放直径来增加涵道比。
In a reversal of current design trends the MIT concept increases the bypass ratio by minimizing expansion of the overall diameter of the engine and shrinking the diameter of the jet exhaust instead.
天鹅座的Loop看起来是个由炽热气体形成的模糊光环(满月直径的6倍大小)，坐落在天鹅座星群的北方。
The Cygnus Loop appears as a faint ring of glowing gases about three degrees across (six times the diameter of the full moon), located in the northern constellation Cygnus the Swan.
典型的解决方法是建造更大直径的排水管和巨大的地下水箱来容纳过量的来水，直至下水管网能够自行处理水流。
The typical solution is for a city to build larger pipes and a giant underground tank to hold the excess water until sewers can handle the flow.
典型的解决方法是建造更大直径的排水管和巨大的地下水箱来容纳过量的来水，直至下水管网能够自行处理水流。
The typical solution is for a city to build larger pipes and a giant underground tank to hold the excess water until sewers can handle the flow.
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