讲解

Today's key word is compulsory. adj.必须做的，强制性的;义务的;必修的.

例句

But compulsory licences for chronic diseases are more controversial.

但在慢性病药品上使用强制许可则更具争议性。

延伸

If something is complusory, you must do it or accept it.Because it is the law or because someone in the position of authority says you must.
Let's use compulsory in a sentence.

In most schools, mathematics education is compulsory.

在大多数学校，数学是必修课。

I wish that someone could tell him that these things are not compulsory.

我希望有人会告诉他这些事情并不是他的义务。

A subsidy of about 20 billion US dollars has been given to compulsory education mostly in rural areas.
So, what's the age for compulsory education?
China has a 9 year free compulsory education which requires every child to receive a formal education from age 6 to 15. The subsidy has risen by 1.2 billion US dollars from last year.
The subsidy will mostly go to schools in the central and western part of the country for renovating school buildings and raising teachers' salaries.
(Discussion)
It means: 200 yuan per square meter for school renovation
40,000 yuan more for each teacher's annual payment
The statement also stressed that any embezzlement of the money will be severely punished.
Notes:
-为进一步提高城乡义务教育经费保障水平，中央财政日前下拨城乡义务教育补助经费1305.8亿元，比2014年增加约80.9亿元，增长6.6%。
-今年中央财政将在落实好“两免一补”、学生营养改善计划、乡村教师生活补助、城市免学杂费等各项政策基础上，继续完善城乡义务教育经费保障机制有关政策，进一步提高经费保障水平。