完善失业保险制度的英文：
to improve the unemployment insurance system

improve是什么意思：
v. 改进；提高…的价值；利用；提高

There is still room for improvement.
还有改进的余地。

Technical advances improve productivity.
技术进步提高生产力。

Her service has improved.
她的发球有了提高。

unemployment是什么意思：
n. 失业，失业人数

Article19 The unemployed who receive medical treatment during the period of receiving unemployment insurance compensation, may apply for medical subvention from social insurance agencies.
第十九条失业人员在领取失业保险金期间患病就医的，可以按照规定向社会保险经办机构申请领取医疗补助金。

We should posit unemployed.
我们应安置未聘人员。

The workshop has shut down and the workers are unemployed.
作坊关闭后工人失业了。

insurance是什么意思：
n. 保险；保险费；预防措施

The amount of a claim on an insurer by an insured.
险损赔偿额保险人从承保人获得的赔偿数量。

An insurance company will insure your house against fire.
保险公司愿为你的房屋保火险。

I have insured my car with a Japanese insurance company
我已向一家日本保险公司投了我的汽车保险。