重点讲解：
1. have the ability to do sth.
有能力做某事；
eg. He has the ability to bring out the best in others.
他能做到扬人之长。
eg. She has the ability to keep calm in an emergency.
她有处变不惊的本事。
2. be able to do sth.
能做到…的；可以…的，能够…的；
eg. The company say they're able to keep pricing competitive.
该公司说他们能够使定价保持竞争力。
eg. You'll be able to read in peace.
你就能安心地读书了。
3. have the opportunity to do sth.
有机会做某事；
eg. I had an opportunity to go to New York and study.
我曾经有一个去纽约学习的机会。
eg. I'm very glad to have the opportunity to meet you.
我很高兴有机会同您见面。
