今天我们要学的单词是：fathomable。这是一个形容词 ，表示可以理解的。例如：你可以说："Thirty years ago, not many people would have thought that they could buy a personal computer. Such an idea was not fathomable by ordinary people back then."（三十年前，不是所有人都能想到他们可以买得起一台电脑。这种想法对于普通人来说是非常不能理解的。）
