句子反复磨耳朵（高级续）71-75

71. He began to learn English when he was twelve years old, that is to say, when he entered junior high school. 他十二岁时也就是当他进入初中时就开始学英语了。 72. Irene Pepperberg, a researcher at Northwestern University, is discovering that a parrot can not only mimic people but also learn the meaning of words. 西北大学研究员艾琳·佩珀伯格发现，鹦鹉不仅能模仿人，而且还能理解单词的含义。 73. The restraining role that the community once played is losing its force as adults become reluctant to reprimand other people's unruly children. 社区曾经具有的规范作用正在失去它的力量，因为成年人越来越不愿意斥责别人家的熊孩子。 74. I thought that if we lined up benches in the garden as well, we could achieve quite a seating capacity. 我想，如果我们也在花园里摆好长椅，我们就能达到相当大的座位容量。 75. Don't give in to despair just because you didn't get into the college that was at the top of your wish-list. 不要仅仅因为你没有进入在你最想进去的大学而绝望。