词汇讲解：

1. approve vt.赞成，同意
例句：Not everyone approves of the festival
不是所有人都赞成庆祝该节日。

2. negotiation n.协商，谈判; 转让; 通过
例句：We have had meaningful negotiations and I believe we are very close to a deal
我们已进行了有益的磋商，我相信我们很快能成交。

3. expand vt.扩张; 使…变大; 详述
例句：Engineers noticed that the pipes were not expanding as expected
工程师注意到管道并没有如预期那样膨胀。

4. negotiate vi.谈判，协商，交涉
例句：It is not clear whether the president is willing to negotiate with the democrats
还不清楚总统是否愿意和民主人士洽谈。

5. affect vt.影响; 假装; 感动
例句：An unhappy home environment can affect a child's behaviour.
不愉快的家庭环境能影响儿童的行为。
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