interactions相互作用

1、Scientists at workin a chemistry labdoing an experiment an English-Chinese dictionary, an English book and a notebook in a physics labdoing an experimentin a biology lab looking at something through a microscopechemistry science of elements原理原理 and their laws规律规律 of combination结合结合 and change elemen

2、t元素元素 substance物质物质 gas, liquid, solid chemical change chemistry experiments language the system系统系统 of sounds and words used by humans to express their thoughts and feelings sounds, words, phrases, sentences grammar communication 交流交流 native/mother language foreign languagephysics science of matter

3、 and energy and of interactions相互作用相互作用 between the two matter power energy physical change physics experiment Biology生物学生物学 science of life and of living organisms生物体生物体 animal plant living things gene遗传因子遗传因子 cell细胞细胞 protein蛋白质蛋白质 biology experiment Useful expressions on P 23Useful expressions on

4、 P 23 be to do sth: should /must do, plan to do a maglev train in ones opinion (a) waste of money much too / too much in the future mean to do sth./ mean doing sth. make (good/full) use of The money would be better spent building more roads or railways in other parts of China.Cloning1.can help some

5、women have babies2.can help medical research1.it is not natural to make people2.dangerous, people use it to do strange thingsNuclear energy1.can make all the electricity we need2.is a limitless resource1.unsafe to all life if not controlled2.can be expensive to build/repairSpeaking on P23 Computers1.makes communication faster2.can keep information better1.unsafe because of viruses2.makes more problems than it solves Space flights1.makes research of outer space poss