对于准备考托福的同学们来说，不知道准备得怎么样呢？今天就和出国留学网的小编一起来看看托福写作有哪些表原因的词汇？
consequently
Consequently， it is more difficult for gases to “evaporate” from them. [TPO 16-3-5]
therefore
Many scientists have therefore concluded that a sixth great mass extinction is currently in progress. [TPO 15-2-2]
thereby
He thereby transformed an inefficient pump of limited use into a steam engine of a thousand uses. [6-1-2]
so that
In the 1760s， James Watt perfected a separate condenser for the steam， so that the cylinder did not have to be cooled at every stroke； then he devised a way to make the piston turn a wheel and thus convert reciprocating （back and forth） motion into rotary motion. [TPO 6-1-2]
so as to
Another generation passed before inventors succeeded in combining these ingredients， by putting the engine on wheels and the wheels on the rails， so as to provide a machine to take the place of the horse. [6-1-4]
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