1.slogan n.口号；标语

A slogan is over the blackboard.
一条标语在黑板正上方。

2.astronomer n.天文学家

He wished to be an astronomer when he was a child.
他还是孩子的时候就梦想成为天文学家。

3.telescope n.望远镜

He saw a hungry wolf on the prowl with his telescope.
他通过望远镜看到了一头四处觅食的饿狼。

4.constellation n.星座；星群

A constellation is a stellar system.
一个星座就是一个恒星星系。

5.candidate n.候选人；应试者

There are three candidates for the vacancy.
这一空缺有三名候选人。