字面意思：as a result，是作为结果，翻译成因此；
for this reason, 是基于此原因，也翻译为因此。
as a result常常是直事情发生的先后顺序，而for this reason则更强调于逻辑的承接性。
比如说：He saved that boy in this accident, as a result, boy's father gave him a lot of money.
Fish must be living in the water, for this reason, it dies when you put it in the air for along time.
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