重点讲解：
1. in contact with
保持联系；有联系；
eg. When hydrogen peroxide comes in contact with silver, it creates super heated steam.
当过氧化氢与银接触就会发生反应，生成大量的热蒸汽。
eg. From there I tracked down other sites and found myself increasingly in contact with other people whose babies had died.
从这里我还找到了其他网站，发现自己和其他失去过孩子的人有了越来越多的联系。
2. break up
（使）分裂；（被）拆分；（使）破碎；
eg. Workers also used chemical dispersants to break up the oil.
工人们也使用化学消油剂分解石油。
eg. When does the ice break up on the river?
河里的冰什么时候融化？
3. mix up
混合；
eg. Mary's children love to mix up the fruit and nuts in the cake before it is cooked.
玛丽的孩子们在烤蛋糕之前，喜欢把果脯和坚果拌进蛋糕里。
eg. Mix up the salt with the pepper.
把盐和胡椒粉混合在一起。
4. divide up
均分；平分；
eg. The aim was to divide up the business, give everyone an equal stake in its future.
目的是为了平分公司股份，让每个人将来承担均等的风险。
eg. They divvied up the winnings between them.
他们瓜分了赢得的钱。
