1.eclipse n.(日、月)食; 日蚀;月蚀
例句：There was a total eclipse showing up in the sky on July 22, 2009 in China.
2009年7月22日，中国的天空上呈现了一场日全食。
使黯然失色; 使蒙上阴影; 使相形见绌; 使丧失重要性
例句：Our happiness was soon eclipsed by the terrible news.
我们的快乐很快就被可怕的消息蒙上一层阴影。
2.lunar adj.月的, 月球的
例句：The lunar stone is different from earth's.
月球的石头和地球的不同。
3.sundial n.日晷, 日规
例句：Churchyards often have sundials in them.
教堂大院里通常设置日晷。
4.observatory n.天文台;气象台
例句：Guy’s house was close to the observatory.
盖伊的房子离天文台很近。
1.When the hourglass is turned with the upside down, it begins to mark the passing of another hour.
upside down翻转
例句：The aero planes were flying upside down and doing other wonderwork.
飞机正在表演倒飞和其他绝技。
The box was lying on the floor upside down.
盒子翻倒在地板上。
2.Most people have no trouble agreeing that time moves forward.
have trouble doing相当于have difficulty doing做某事有困难。have difficulty/trouble/problem doing sth这几个短语的用法相同。
例句：We had difficulty (in) carrying out the plan．
我们执行计划有困难。