这个差距告诉我们需要做多少工作。
只要有水，不管多少，我们都需要做一些事。
As long as there's water, no matter how little, we need to do something.
我们知道如何去探寻，我们知道需要做多少探寻，可是这非常昂贵。
We know how to make the search, we know how much searching is required, but it's very costly.
我们也发现我们需要在迭代中期进行检验会议，这 样我们可以问这个问题“在这个反复中我们还需要做多少的工作？ 我们将全部做完么？”
We also found that we needed a mid-iteration checkpoint meeting so we could ask the question, "How much more work have we got to do for this iteration and are we going to do it all?"
虽然运动能很大程度地抵消久坐带来的伤害，但是我们一直不清楚需要做多少的运动量——直到现在。
While exercise is a big part of offsetting the harmful effects of sitting, it was unclear how many gym sessions were needed to help - until now.
虽然运动能很大程度地抵消久坐带来的伤害，但是我们一直不清楚需要做多少的运动量——直到现在。
While exercise is a big part of offsetting the harmful effects of sitting, it was unclear how many gym sessions were needed to help - until now.
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