1. barrier n.屏障; 障碍; 栅栏
例句:He rushed beyond the barrier.
他冲过了栅栏。
2. solve vt.解决; 解答; 解释
例句:We solve this problem by applying the powerful concept of a model.
为了解决这个问题,我们使用模型这种强有力的概念。
3. involve vt.包含; 使参与,牵涉
例句:It would involve all Rome in a fearful strife.
这将使整个罗马卷入一场可怕的战争。
4. invest vt.投资; 花费
例句:Can I be sure of a profit if I invest?
我要是投资, 肯定能获利吗?
5. struggle vi.奋斗; 搏斗; 努力
例句:Why should we force a future dentist to struggle with French grammar?
我们为什么要强迫一个未来的牙医去死啃法语语法?
6. transform vt.变换; 改变; 改观
例句:He knew that he could not transform society by one bugle blast.
他知道,改造社会不能一蹴而就。