慢速英语:Abraham Lincoln: Martyr (Part Three)

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短语讲解：

1.Lee’s soldiers aimed at the center of the Union line, positioned behind stone walls at the top of a ridge, or raised area.

at the top of 在…顶上
例句：I waited at the top of the stairs.
我在楼梯顶端等着。

2.At the same time, more Union forces attacked the Confederate soldiers on the left and right.

at the same time 同时; 一起; 但是; 然而
例句：Never before has the industry had to cope with war and recession at the same time
这个行业以前从未有过必须同时应付战争和萧条的经历。

3.He also pointed to the Declaration of Independence as the country’s founding document.

point to 指; 显示…的位置[方向]; 表明; 指画
例句：I can't point to any one particular reason for it.
那件事我找不出具体原因来.

4. At the swearing-in ceremony, the president spoke about the need for the North and South to come together again peacefully.

speak about 谈论; 提到…
例句：He has nothing to speak about that thing.
关于那件事他没有什么可说的。