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.
New words：
envious ['enviəs] adj.羡慕的；忌妒的
be envious of 羡慕；忌妒
Sample Sentences：
Everyone is so envious of her.
He saw the envious look in the other boy's eyes.
We are all envious of his great progress in English.
New words：
envy [ˈenvi]
v.羡慕；忌妒；庆幸（不必做别人非做不可的事）
n.羡慕；忌妒
Sample Sentences：
Everyone envies their happiness.
She has always envied my success.
They were full of envy when they saw my new car.
Her many talents are the envy of all her friends.