New words：
delay [dɪˈleɪ]
v.延迟；推迟；延期；使迟到
n.延误；延期；耽搁；延迟
Sample Sentences：
The arrival of the train was delayed.
Your flight might be delayed… or even cancelled.
The plane's landing was delayed because of heavy fog.
Report it to the police without delay (= immediately) .
flight [flaɪt] n.飞行；班机；飞行
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