1. propose vt.求婚; 提议，建议
例句：Britain is about to propose changes to some institutions
英国将提议对一些机构进行改革。

2. immigration n.移居; 移民人数
例句：The government has decided to tighten its immigration policy.
政府决定实施更加严格的移民政策。

3. strengthen vt.加强，巩固; 勉励
例句：You cannot strengthen the weak by weakening the strong.
削弱强者不能使弱者变得强壮。

4. confirm vt.证实; [法] 确认，批准
例句：X-rays have confirmed that he has not broken any bones
X光片证实他没有骨折。
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