1. There is no other way whereby we can cross the river.
    我们没有别的办法过河。

2. Whereby shall I know this?
    我怎么才能知道这个呢？

1. 其中：thereby 从而,以 | whereby 其中 | wherein 其中

2. 凭什么, 为何：sampling window 取样窗 | whereby 凭什么, 为何 | Hansom 汉瑟姆(姓氏)

3. 如何：whereas 然而 | whereby 如何 | wherefore 何故

4. whereby

4. 为甚么：02. 飞起来了 Fly Away | 03. 为甚么 Whereby | 04. 到此为止 Discontinue Here

1. 凭此;借以
    A system or action whereby something happens is one that makes that thing happen.

    e.g. ...the system whereby Britons choose their family doctors and the government pays those doctors...
           通过这个系统，英国人选择自己的家庭医生，而由政府给那些医生支付薪水
    e.g. They voted to accept a deal whereby the union will receive nearly three-quarters of a million pounds from the International Miners Organisation.
           他们表决同意了一项协议，根据这一协议工会将从国际矿工组织得到近75万英镑。