VOA慢速英语:Remember Your Chemistry Classes?

短语讲解：

1. The Periodic Table lines up -- or organizes -- chemical elements in order of atomic number.

line up 排成一行; 排队等候
例句：Line up the glasses, and I'll fill them. 
把玻璃杯排好,我来斟酒。 

2. The elements made in laboratories -- such as 117 -- are extremely unstable.

such as 像， 例如
例句：Context scenarios address questions such as the following: 
情境场景剧本解决了以下的问题。 

3. They last only minutes before breaking down into long-lasting elements.

break down 失败; 划分（以便分析）; 损坏
例句：What guarantee do I have that it won't break down easily? 
有什么保障它不会轻易出故障？ 

4. But such production may also lead to the discovery of new technologies.

lead to 把…带到; 领到; （道路）通向; 导致
例句：A little exaggeration can lead to serious consequences.
一丝一毫的夸大都可能导致严重的后果。