Chemistry
　　常用句子
　　Our chemistry paper is too difficult.我們的化學(xué)試卷太難了。
　　I'm thinking whether I can pass or not.我在想我考試能不能及格。
　　I like chemistry not because itself is interesting but because there are many experiments in chemistry lab.我喜歡化學(xué)不是因為它有趣，而是因為有好多的化學(xué)實驗。
　　It's dangerous if one doesn't following our teacher's instructions.如果不按老師的示范去做那將很危險。
　　Chemistry is important for me because in the future I want to be a chemist.將來我想當(dāng)化學(xué)家，所以化學(xué)對我來說很重要。
　　Is chemistry more useful than physics？化學(xué)比物理重要嗎？
　　I think chemistry is as important as physics.我認(rèn)為化學(xué)與物理同等重要。
　　Chemistry becomes so interesting with our teacher's explanation.化學(xué)經(jīng)我們老師的講解顯得有趣多了。
　　Do you know what is H2O？你知道H2O是什么嗎？
　　I think chemistry teachers are the same characters with rare hair on the head.我覺得化學(xué)老師都有相同的特點：頭發(fā)少。
　　Every time I'm dreaming in class our chemistry teacher pulls me back to his humorous explanation.每次化學(xué)課上我昏昏欲睡的時候，我們的化學(xué)老師幽默的講解又使我精神振作。
　　The chemical industry is a fast growing industry in China.化學(xué)工業(yè)在中國是一種發(fā)展很快的工業(yè)。
　　Is this a chemical change or a physical change when wood becomes desks？
　　木材變成桌子是物理變化還是化學(xué)變化？
　　There will.be a chemistry test tomorrow morning.明天上午考化學(xué)。
　　Maths常用句子
　　The simplest real numbers are the natural numbers，which are just the ordinary counting number l，2，3…
　　最簡單的真數(shù)是自然數(shù)，即平時我們口數(shù)的一、二、三…。
　　One convenient way to visualize the real numbers is by the way of a number line.將真數(shù)形象化的最方便的途徑是通過數(shù)軸。
　　The numberπis sometimes approximated by the rational number 22/7.圓周率π約等于22/7. Rational numbers and irrational numbers together form the set of real numbers.有理數(shù)與無理數(shù)一起構(gòu)成實數(shù)。
　　In mathematics the symbol A = B means A and B are two names for the same thing.在數(shù)學(xué)中A = B意思是A、B是同一事物的兩個名稱。
　　I become headache with maths problems.我一解數(shù)學(xué)題就頭痛。
　　A right angle is an angle of 90°，and a straight angle is one of 180°。
　　直角是90°角，平角是180°角。
　　Why do we always have maths in the fourth period？為什么我們總在第四節(jié)課上數(shù)學(xué)？