1.

1. He wished to travel and thereby study the customs of other countries.
    他希望去旅游藉此研究其它国家的民俗风情。

2. thereby

2. He became a citizen, thereby gaining the right to vote.
    他成了公民，因此有投票权。

3. I have never been to that city; thereby I don''t know much about it.
    我从未去过那座城市，因此对它不怎么熟悉。

4. His home is hidden in the trees thereby.
    他的家就在那附近的树林之中。

1. 因此：Thereby hangs a tale 其中大有文章 | thereby 因此 | therefor 为此

2.

2. 从而,以：therewith 随后 | thereby 从而,以 | whereby 其中

3. 因此,从而：theoretically 理论地 | thereby 因此,从而 | thermoplastic 热塑性的

4. 从而：summit 峰会;首脑会议 | thereby 从而 | threat 威胁,恐吓

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。

1. by that means or because of that

    e.g. He knocked over the red wine, thereby ruining the table cloth