1.a lot of （很多，很普通）
a multitude of / an abundance of /many （大量，丰富）
A lot of people believe this is true.
A multitude of individuals contend that this is the case.
2.
pretty important （很重要）
of paramount importance / of critical significance / indispensable （至关重要）
Education is very important for society.
Education is of paramount importance to societal development.
3.
bad for… （对……不好）
detrimental to / deleterious to / adverse to （有害于）
This is bad for health.
This is detrimental to human health.
4.
good for… （对……有好处）
beneficial to / conducive to / instrumental in （有益于）
Exercise is good for health.
Regular exercise is conducive to maintaining good health.
5.
a big problem （一个很大的问题）
a pressing issue / an acute problem / a profound challenge （紧迫、严重问题）
This is a big problem in many cities.
This constitutes a pressing issue in many urban areas.
6.
hard to do / difficult （难）
arduous / formidable / taxing （艰难、严峻）
It’s hard to control pollution.
Curbing pollution remains a formidable challenge.
7.
easy to do （容易）
feasible / viable / attainable （可行）
It is easy to implement this policy.
This policy is both feasible and attainable.
8.
many different kinds of… （很多不同种类的）
a diverse array of / a wide spectrum of / a broad range of （种类繁多）
People have many kinds of choices.
Individuals have access to a diverse array of choices.
9.
make something better / improve （改善）
enhance / ameliorate / foster （提高、改善、促进）
We need to improve education.
We need to enhance the quality of education.
10.
a lot of money is spent on…
substantial resources are allocated to… / considerable funds are devoted to…
A lot of money is spent on healthcare.
Substantial resources are allocated to healthcare provision.
