therefore /ˈðeɚˌfoɚ/ adverb Learner's definition of THEREFORE
somewhat formal
: for that reason : because of that因此;所以 -
The cell phone is thin and light and therefore very convenient to carry around.这部手机很轻薄,所以方便携带。
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Payment was received two weeks after it was due; therefore, you will be charged a late fee.付款逾期了两周,所以你应支付滞纳金。