重点讲解：
1. come across
偶然发现；偶然遇见；
eg. I came across a group of children playing.
我碰到一群正在玩耍的小孩。
eg. We must hang in whenever we come across difficulties.
我们遇到困难时一定要坚持不懈。
2. be proud of
以……而骄傲；自豪；
eg. I felt proud of his efforts.
我为他的努力感到骄傲。
eg. She is pardonably proud of her wonderful cooking.
她对自己出色的烹调技术感到骄傲，是可以理解的。
3. take over
占领，接管，控制；
eg. You are to take over one of the subdivisions.
你将接管其中一个分部.
eg. Robert tried to take over the business for his wife's sake.
由于他妻子的缘故，罗伯特设法接管业务.
4. full scale
完全的；彻底的；最大限度的；
eg. The fighting escalated into a full-scale war.
这场交战逐步扩大为全面战争。
eg. Full-scale reconstruction is under way.
百废俱兴。
