1. cut the clutter, more tricks

(1)eliminate negatives
she was not often right----she was usually wrong
she did not want to perform the experiment incorrectly----she wanted to perform the experiment correctly
they did not believe the drug was harmful----they believed the drug was safe
not honest----dishonest
not harmful----safe
not important----unimportant
dose not have----lacks
did not remember----forgot
did not pay attention to----ignored
did not succeed----failed
(2)eliminate superfluous uses of "there are/there is"
there are many ways in which we can arrange the pulleys----we can arrange the pulleys in many ways
there was a long line of bacteria on the plate----bacteria lined the plate
there are many phisicists who like to write----many phisicists like to write
the data confirm that there is an association between vegetables and cancer----the data confirm an association between vegetables and cancer
(3)omit needless prepositions
the meeting happened on Monday
they agreed that it was true

2.practice cutting clutter

(1)anti-inflammatory drugs may be protective for the occurrence of Alzheimer's disease----anti-inflammatory drugs may protect against Alzheimer's disease
(2)clinical seizures have been etimated to occur in 0.5% to 2.3% of the neonatal population----clinical seizures occur in 0.5% to 2.3% of the newborns
(3)ultimately p53 guards not only against malignant transformation but also plays a role in developmental processes as diverse as aging, differentiation, and fertility----besides preventing cancer, p53 also plays roles in aging, differentiation, and fertility
(4)injuries to the brain and spinal cord have long been known to be among the most devastating and expensive of all injuries to treat medically----injuries to the brain and spinal cord are among the most devastating and expensive
(5)an IQ test measures an individual's abilities to perform functions that usually fall in the domains of verbal communication, reasoning, and performance on tasks that represent motor and spatial capabilities----an IQ test measures an individual's verbal, reasoning, or motor and spatial capabilities
(6)as we can see from figure 2, if the return kinetic energy is less than 3.2 U, there will be two electron trajectories associated with this kinetic energy----figure 2 shows that a return kinetic energy less than 3.2 U yields two electron trajectories

3.writing in the sciences

重要的观点、发现要放在最前面
简化句子，减少重复意思
多用动词少用名词