短语讲解：

1. Human Rights Watch says that if the students do not receive a quality education, they would be in danger of being exploited in dangerous and low-paying jobs in the future.

in danger of 处于…危险之中
例句：Apes are in danger of extinction
猿类正处于绝种的危险之中。

2. It would be the same as if the three largest public school systems in the U.S. – New York, Chicago and Los Angeles – closed.

as if 好像， 似乎， 仿佛
例句：He acted as if nothing had happened.
他表现地就像没发生什么似的。

3. The Syrian American Council says it is important to focus on school-aged children today.

focus on 致力于; 使聚焦于
例句：We should focus on day-to-day work.
我们要把主要精力放到经常工作方面。