Just for argument's sake, suppose we disagree.
为了讨论各种情形,让我们假设我方不同意时的处理方法。
The cry had certainly come form one of the chimneys, but as there were so many of them, the fire fighters could not be certain which one it was.
喊叫声肯定是从烟囱里传出来的,然而,因为烟囱太多,消防队员无法确定到底是哪一个。