New words：

community [kəˈmjunəti] n.社区；社团；公众；社会团体

Sample Sentences：

I joined a reading community.
Our community has a big park for kids to play.
Many students do community service during summer vacation.

New words：

communication [kəˌmjunɪˈkeɪʃ(ə)n] n.通信；交际；交流；信息

Sample Sentences：

We are in regular communication by letter.
Animals have their own ways of ​​communication​​.
The new airport will improve communications between the islands.

New words：

communicate [kəˈmjunɪˌkeɪt] v.沟通；传达；交际，交流；传播；传染

Sample Sentences：

They communicated in sign language.
Dolphins use sound to communicate with each other.
The disease is communicated through dirty drinking water.
He was eager to communicate his ideas to his best friend.

communication [kəˌmjunɪˈkeɪʃ(ə)n] n.通信；交际；交流；信息

New words：

prevent [prɪˈvent] v.阻止；阻碍；阻挠

prevent sb/sth (from doing sth) 阻止；阻碍；阻挠

Sample Sentences：

Eating healthy food helps prevent illnesses.​
​​The fence prevents dogs from entering the garden.​
Snow has prevented communication with the outside world for three days.

communication [kəˌmjunɪˈkeɪʃ(ə)n] n.通信；交际；交流；信息

New words：

enviously ['envɪrslɪ] adv.羡慕地;满怀嫉妒地

Sample Sentences：

Did the boy look enviously at the kids playing games?
She looked enviously at her friend's new bike, wishing she could have one too.