英汉词典

1. 因此;由此;从而
    You use thereby to introduce an important result or consequence of the event or action you have just mentioned.

    e.g. Our bodies can sweat, thereby losing heat by evaporation...
           我们的身体能出汗，由此可以蒸发散热。
    e.g. A firm might sometimes sell at a loss to drive a competitor out of business, and thereby increase its market power.
           公司有时会通过亏本出售来将对手挤垮，从而提高其市场地位。