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.

New words：

analyze [ˈænəlaɪz] v.分析；分解
analyse [ˈænəlaɪz] v.分析；分解

Sample Sentences：

The job involves gathering and analysing data.
We can analyse water into oxygen and hydrogen.
We should analyze the cause and effect of this event.
We should analyse what they said and not just agree with everything.

hydrogen [ˈhaɪdrədʒən] n. 氢；氢气