日全食total solar eclipse

    日全食是日食的一种，即太阳被月亮全部遮住的天文现象。如果太阳、月球、地球三者正好排成或接近一条直线，月球挡住了射到地球上去的太阳光，月球身后的黑影正好落到地球上，这时发生日食现象。

    在地球上月影里的人们开始看到阳光逐渐减弱，太阳面被圆的黑影遮住，天色转暗，全部遮住时，天空中可以看到最亮的恒星和行星，几分钟后，从月球黑影边缘逐渐露出阳光，开始生光、复圆。由于月球比地球小，只有在月影中的人们才能看到日全食。月球把太阳全部挡住时发生日全食，遮住一部分时发生日偏食，遮住太阳中央部分发生日环食。发生日全食的延续时间不超过7分31秒。中国有世界上最古老的日全食记录，公元前一千年已有确切的日全食记录。

例句与用法：

1.                     The longest total solar eclipse of the 21st century has sparked tourist fever in eastern China.

在中国东部地区，21世纪持续时间最长的日全食已经激起了旅游者的热情。

2.                     Total solar eclipses are among nature's most spectacular phenomena that dazzle astronomers.

日全食是最为壮观的自然现象，天文学家们都为之倾倒。

媒体视角：

NANJING -- China will see the longest total solar eclipse in 500 years on July 22, a scientist said Saturday.

The prime time of the total eclipse was expected to begin from 9 a.m. to 9:38 a.m. (Beijing Time), said Wang Sichao, a research fellow with the Nanjing-based Purple Mountain Observatory under the Chinese Academy of Sciences.

"The total eclipse will last up to six minutes, or the longest one that can be seen in China in almost 500 years from 1814 to 2309," Wang said.

--"Total solar eclipse to come, longest in 500 years", from China Daily

......