重点讲解：
1. keel over （因疲劳或生病而）倒下，瘫倒；
例句：He then keeled over and fell flat on his back.
然后，他便仰天倒下了|-x5K.khRl。
2. be linked to 联系；关系；关联；
例句：It is generally accepted that wages should be linked to prices.
人们普遍认为,工资应与物价联系起来Wgg7q&FDsQQZszc&。
3. look ahead 展望未来；规划未来；
例句：We are trying to look ahead and see what our options are.
我们努力着眼于未来,看我们有什么选择Ls8f#;_|7X*G7.。
4. tend to do sth. 往往会；经常就；
例句：I tend to prefer have a holiday at seaside.
我往往更喜欢在海滨度假;mWv&a@BaJ。