The government has decided to tighten its immigration policy.是什么意思？

The government has decided to tighten its immigration policy.

政府决定实施更加严格的移民政策。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

government

n. 政府，政体，治理的形式，管辖，治理；

例句
The government is to accelerate its privatisation programme.
政府将加快其私有化计划的进程。

has

v. 有( have的第三人称单数 )，（亲属关系中）接受，拿，买到；

例句
...the operation a patient has had.
病人做过的手术

decided

adj. 清楚的，坚决的，明显的，明白无误的；v. 下决心( decide的过去式和过去分词 )，（使）决定，解决，裁决；

例句
The scheme's investors, fearful of bankruptcy, decided to abandon the project.
因为担心破产，该计划的投资者决定放弃这个项目。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

tighten

vt.& vi. 收紧，（使）变紧，（使）绷紧，加紧；

例句
Clearly, if you are spending more than your income, you'll need to tighten your belt.
明摆着，要是你入不敷出，你就得省着点了。

its

pron. (it的所有格形式)它的，厥；

例句
The government is to accelerate its privatisation programme.
政府将加快其私有化计划的进程。

immigration

n. 移居，移民人数，移民局检查站；

例句
I am also looking forward to getting more acquainted with immigration law.
我也期待能对移民法有更多的了解。

policy

n. 政策，策略，保险单，策略性；

例句
We have seen this as an attempt to place the blame for a policy that has gone adrift.
我们已经认识到，这是把责任归咎于一项已偏离方向的政策的一种企图。