阅读难度：

A large metallic space ball fell out of the sky on a remote grassland in Namibia, prompting authorities to contact NASA and the European space agency, the Daily Telegraph reported.

The hollow ball, which has a circumference of 43 inches (109.22 cm), was found near a village in the north of Namibia some 480 miles (768 km) from the capital Windhoek.

Locals had heard several small explosions a few days beforehand, said police forensics director Paul Ludik.

With a diameter of 14 inches (35.56 cm), the ball has a rough surface and appears to consist of "two halves welded together".

It was made of a "metal alloy known to man" and weighed 13 pounds (5.90 kg).

（点击英国《每日电讯报》查看原文）

不明“天外客”坠纳米比亚

       据英国《每日电讯报》报道，一个巨大的金属球体从太空坠下，落在纳米比亚一处偏僻的草原中，该国当局因此向美国宇航局和欧洲宇航局寻求帮助。

       该空心球体周长43英寸（109.22厘米），在首都温得和克以北480英里（768公里）处的一个小村庄附近被人发现。

       警方证据科总长保罗•卢迪克说，（坠落）之前的几天，当地人就听到了几声爆炸。

       铁球直径14英尺(35.56厘米)，表面粗糙，看起来是由“两个半球焊接而成”。

       它是由“人类所知的合金”制成，重13磅（5.90千克）。

(China.org.cn December 27, 2011)