1. Well, I measured the distance of ground, and calculated how deep it was to be dug, how broad, and how the earth to be thrown out.
    接着，我测量了一下距离，计算了一下该挖多深、多宽，以及怎样把土运走。

2. This may sound fantastic, but it is easily calculated.
    这点听起来令人难以置信，但却很容易计算出来。

3. And by measuring the time interval between the taps and the receipt of the echoes, the depth of the sea at that point can be calculated.
    测出回声间隔的时间，便可算出该处海洋的深度。