SpaceX发射美军最先进的GPS卫星_科学技术

SpaceX发射美军最先进的GPS卫星

文章来源：未知文章作者：enread 发布时间：2018-12-24 08:06 字体： [大中小]　进入论坛

(单词翻译:双击或拖选)

SpaceX has launched the U.S. Air Force's most powerful GPS satellite ever built.

SpaceX公司将美国空军最先进的GPS卫星送入太空。

A Falcon¹ 9 rocket blasted off from Cape² Canaveral, Florida, on Sunday, hoisting³ the satellite into orbit.

The satellite was supposed to soar Tuesday but rocket concerns and then weather delayed the flight.

Heather Wilson, secretary of the Air Force, says this next-generation GPS satellite is three times more accurate than previous versions and eight times better at anti-jamming. It's the first in a series and nicknamed Vespucci after the 15th-century Italian explorer who calculated Earth's circumference⁴ to within 50 miles (80 kilometers).

Lockheed Martin developed the advanced GPS technology and is building the satellites at a facility near Denver.

Sunday's launch was Space X's 21st and final launch of the year, a company record.

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收听单词发音

1 falcon
n.隼，猎鹰
参考例句：
The falcon was twice his size with pouted feathers.鹰张开羽毛比两只鹰还大。 The boys went hunting with their falcon.男孩子们带着猎鹰出去打猎了。

2 cape
n.海角，岬；披肩，短披风
参考例句：
I long for a trip to the Cape of Good Hope.我渴望到好望角去旅行。 She was wearing a cape over her dress.她在外套上披着一件披肩。

3 hoisting
起重，提升
参考例句：
The hoisting capacity of that gin pole (girder pole, guy derrick) is sixty tons. 那个起重抱杆（格状抱杆、转盘抱杆）的起重能力为60吨。来自口语例句 We must use mechanical hoisting to load the goods. 我们必须用起重机来装载货物。

4 circumference
n.圆周，周长，圆周线
参考例句：
It's a mile round the circumference of the field.运动场周长一英里。 The diameter and the circumference of a circle correlate.圆的直径与圆周有相互关系。

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