西边的半个月亮被照亮 last quarter
西边的天空在红色和紫色的云后面闪着亮黄色的光。
The western sky can glow a brilliant orange behind red and purple clouds.
他们可以继续观测直到7：40月亮完全被吞蚀，然后如果那时在西边还能看到月亮的话，那么他们还能再看一小会儿。
"They can continue watching until the eclipse becomes total at 7.40am, and hopefully for a little while after this time, if they have an unobstructed western horizon."
他们可以继续观测直到7：40月亮完全被吞蚀，然后如果那时在西边还能看到月亮的话，那么他们还能再看一小会儿。
'they can continue watching until the eclipse becomes total at 7.40am, and hopefully for a little while after this time, if they have an unobstructed western horizon.'
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