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
New words：
accountant [əˈkaʊntənt] n. 会计；会计师
Sample Sentences：
Do you want to be an accountant when you grow up?
Our company plans to hire a new accountant to handle taxes this year.
Good accountants must be good with numbers and pay attention to details.