New words：

component [kəmˈpoʊnənt] n.成分；部件；组成部分

Sample Sentences：

There are many components to the machine.
Trust is a vital component in any relationship.
Each component of the model plane must be put together carefully.

vital [ˈvaɪt(ə)l] adj.必不可少的；至关重要的

New words：

composer [kəmˈpoʊzər] n.作曲家；创作者；作曲者

Sample Sentences：

Who is the composer of the song?
He was born to be a great composer.

New words：

compose [kəmˈpoʊz] v.组成；创作(乐曲、诗歌等)；使镇静
be composed of 由…组成

Sample Sentences：

Mozart composed a lot of music.
Yesterday he composed a piece of music.
All living things are composed of cells.
We should compose ourselves in the face of fear.
I was so confused that I could hardly compose my thoughts.

New words：

hydrogen [ˈhaɪdrədʒən] n. 氢；氢气
hydrogen gas 氢气

Sample Sentences：

Water is composed of hydrogen and oxygen.
Hydrogen​​ is the lightest gas in the universe.
When ​​hydrogen​​ burns in air, it produces water.

compose [kəmˈpoʊz] v.组成；

New words：

analysis [əˈnæləsɪs] n.分析；分析结果

Sample Sentences：

My teacher asked us to write an analysis of the story.
She did a detailed analysis of the experiment results.
The blood samples are sent to the laboratory for analysis.