VOA慢速英语:Rebuilding in Moore After Deadly Tornado

短语讲解：

1. And that’s been a big challenge for us -- being able to determine which area of a community we might be in because the streets are just gone, the signs are just gone.”

be able to 能，会
例句：We hope you'll be able to attend.
我们希望你能够前来参加。

2. Weather experts say the tornado had wind speeds of at least 322 kilometers an hour.

at least 至少
例句：Can we at least try?
我们至少试试看吧？

3. “I had them take their backpacks and put them over their heads, just as another safety precaution, as they were down in the center of our room, in the center of our building.”

put over 把…讲清楚；推迟
例句：He put over a complex and difficult business deal.
他完成了一项复杂困难的交易。

4. “I had hem take their backpacks and put them over their heads, just as another safety precaution, as they were down in the center of our room, in the center of our building.”

in the center of 在中间，在中央
例句：There is a big park in the center of my hometown.
家乡的中心位置有一座大公园。