VOA慢速英语:Obama Appeals for Unity, Warns of Threats to Democracy

短语讲解：

1. He called for unity and for all Americans to stay involved in the country’s democracy.

call for 要求; 需要; 去接（某人）
例句：Different circumstances call for different tactics.
不同的情势需要不同的策略。
involve in 使参与[陷入，牵扯到]
例句：The police has took out a summons against the driver of both car involve in the accident.
警方已向肇事的双方驾驶人发出传票。

2. On Tuesday night, he spoke to thousands of supporters.

thousands of 数千的
例句：The library attracts thousands of scholars and researchers.
那个图书馆吸引了成千上万的学者和研究人员。

3. He said the United States is a “better, stronger place” than when he took office in 2009.

take office 就职; 任职; 绾结印绶
例句：When you take office supplies home, you are stealing.
你把办公室的用品拿回家，你就在偷窃了。