文章中將會出現的生詞：
curvature：n. 彎曲，彎曲部分，曲率，曲度
Planet Mercury passes across the face of the Sun水星穿過太陽
Mercury has made a rare transit, where the planet passes across the face of the Sun as seen from Earth. 水星進行了一次罕見的凌日，從地球上看，行星穿過了太陽的表面。
During the transit, Mercury appeared as a dark silhouetted disc against the bright surface of our star. 在運輸過程中，水星在我們恆星的明亮表面上呈現為黑色輪廓盤。
There are 14 transits in this century; the last before this was in 2016, but the next event will not occur until 2032. 本世紀有14個凌日。最後一次發生在2016年，但是下一個事件要到2032年才會發生。
The transit began at 12:35 GMT, when the edge of Mercury appeared to touch the curvature of the Sun. 過渡從格林尼治標準時間12:35開始，當時水星的邊緣似乎觸及了太陽的彎曲部分。
It ended at 18:04 GMT when the edge of the silhouetted planet appeared to leave the Sun's disc. 它在格林尼治標準時間18:04結束，當時剪影行星的邊緣似乎離開了太陽的圓盤。
Professor Mike Cruise, president of the UK's Royal Astronomical Society (RAS), said: "This is a rare event, and we'll have to wait 13 years until it happens again. Transits are a visible demonstration of how the planets move around the Sun." 英國皇家天文學會（RAS）主席邁克·克魯斯（Mike Cruise）教授表示：「這是一次罕見的事件，我們必須等13年才能再次發生。凌日是行星如何繞行星運動的可見例子。太陽。」
The entire event was visible from the eastern US and Canada, the south-western tip of Greenland, most of the Caribbean, Central America, the whole of South America and some of West Africa. 從美國東部和加拿大，格陵蘭島的西南端，大部分加勒比海地區，中美洲，整個南美以及部分西非都可以看到整個事件。
In Europe (including the UK), the Middle East, and most of Africa, the Sun set before the transit ended, and so the latter part of the event was not visible. 在歐洲（包括英國），中東和非洲大部分地區，太陽在轉機結束之前落下，因此該事件的後半部分不可見。
In most of the US and Canada, and New Zealand, the transit was in progress as the Sun rose. Observers in eastern Asia, southern and south-eastern Asia, and Australia were not able to see the transit. 在美國，加拿大和紐西蘭的大多數地區，隨著太陽升起，運輸正在進行中。東亞，南亞和東南亞以及澳大利亞的觀察員看不到這一凌日。
Mercury is the smallest and innermost planet in the Solar System. 汞是太陽系中最小，最裡面的行星。
It completes each orbit around the Sun every 88 days, and passes between the Earth and Sun every 116 days. As the orbit of Mercury around the Sun is tilted compared with the orbit of the Earth around the Sun, the planet normally appears to pass above or below our nearest star. 它每88天完成圍繞太陽的每個軌道，並每116天完成一次在地球與太陽之間的軌道。由於水星繞太陽的軌道與地球繞太陽繞的軌道相比是傾斜的，所以行星通常似乎在我們最近的恆星上方或下方通過。
A transit can only take place when the Earth, Mercury and the Sun are exactly in line in three dimensions. 僅當地球，水星和太陽在三個維度上完全一致時才可以進行凌日。