VOA慢速英语:Startup Companies on the Rise in Nigeria

短语讲解：

1. By using a device that reads bar code information, waste collection crews will be able to know if the home owner has paid for their services.

be able to 能够; 能，会
例句：They may be able to help with childcare so that you can have a break
他们可以帮忙照料孩子，这样你就可以歇一歇了。

2. A total of 30 tech entrepreneurs competed for the chance to meet with the Nigerian president and vice president.

a total of 总数为
例句：Out of a total of 2,602 pupils only 922 passed the test
所有2,602名学生中，只有922名通过了测试。
meet with 碰到; 偶然遇到; 遭受
例句：Now I meet with fewer difficulties in my work.
现在我工作中困难少些了。

3. He spoke at the end of his first visit to Nigeria.

at the end of 在…结尾，在…末端
例句：He parted with us at the end of the trip.
旅行结束时他和我们分手了。