We can do this, because we must.

我们可以做到，因为我们必须这样做。

Because we must never forget that the inconceivable doesn’t happen -- it happens frequently.

因为我们绝不能忘记， 不可思议的事情不会发生——它经常发生。

Please, let me finish. Because we must be absolutely clear about this and I want to be quite frank with you.

拜托，让我说完，因为这件事我们一定要说得清清楚楚，我想跟你说老实话。

And if not today, then tomorrow, because we mustn't wander too far off, Conseil added. That's why I propose that we return to the skiff.

如果今天碰不着，明天一定可以碰着，康塞尔补充说，因为我们不应走得过远。我要提议回小艇中去了。