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词汇讲解：

1. withdraw vt.撤走; 拿走; 撤退
例句：We would rather withdraw the draft resolution than amend it. 
与其修改草案，不如予以撤回。 

2. revoke vt.撤销，取消
例句：A testator may revoke or alter a will he previously made. 
遗嘱人可以撤销、变更自己所立的遗嘱。 

3. approval n.同意; 批准
例句：The crowd roared their approval. 
一群人高喊着他们的口号。 

4. undermine v.逐渐削弱; 使逐步减少效力; 从根基处破坏
例句：They will do anything to undermine their adversary's reputation. 
他们会不择手段地去损害对手的名誉。 

5. relieve vt.解除; 缓解
例句：The route was designed to relieve traffic congestion. 
这条路是为缓解交通拥挤而开辟的. 

6. apologise vi.道歉
例句：They did not apologise for it, however. 
只是谁也不为此而道歉。