VOA慢速英语:Immigrants Become Citizens at U.S. National Park

短语讲解：

1. The island is one of more than 400 sites within the U.S. National Park Service.

more than 超过; 不只是; 很; 在…次以上
例句：He supervised and trained more than 400 volunteers.
他指导和培训了400多名志愿者。

2. But, on a recent Monday morning, more than 40 people from 28 countries arrived at the island for a different reason.

arrive at 到达; 来到; 达成
例句：I' ll get the sack if I arrive at the office late !
如果上班迟到，我就得被开除。

3. Instead of exploring, they recited an oath of allegiance.

instead of （用…） 代替…， （是…）而不是…
例句：The farmers will be paid for their grain in cash, instead of IOUs.
农民卖粮，将以现金支付，而不是白条了。

4. It's been a rigorous process, as far as like six or seven years back.

as far as 只要; 远到…
例句：As far as I'm concerned the officials incited the fight.
在我看来，是官员们煽动了这场争斗。

5. I feel that we need to be more involved in the democracy of the country.

involve in 使参与[陷入，牵扯到];
例句：They expostulate with him about the risk involve in his plan.
他们指出他的计划有风险，劝他放弃。