1. In 1849, he went to England and made London the base for his revolutionary work.
    1894年, 他到了英国, 并把伦敦作为他从事革命工作的基地.

2. It also provides----and some student sociologist might care to base his thesis upon the phenomenon----an escape of another kind.
    学社会学的大学生来露营是另一种形式的摆脱现实，他们的目的很可能是根据观察到的露营现象去写论文。

3. I bound the base of the tree with sticky tape, making it impossible for the ants to reach the aphids.
    我用一条胶带把桃树底部包上，不让蚂蚁接近蚜虫。

4. Its base covered thirteen acres.
    它的基底占地13英亩，

5. Families are at the base of a socio-economic pyramid.
    家庭是社会经济金字塔的基础。

6. For a long time, I watched them scurrying around the base of the tree in bewilderment.
    在很长一段时间里，我看见蚂蚁围着大树底部来回转悠，不知所措。

7. For the $3.99 they earned each minute for the company, they kept only 25 cents in base pay — with no other benefits.
    她们每分钟为公司赚3.99美元，而得到的基本工资只有25美分，没有任何其他的福利。