如今，即使想要知道一大块冰如何移动——或换个词讲，漂浮——是非常困难的，但众所周知冰川漂浮是由于重力。
Now, even though it may be difficult to understand how a huge mass of ice can move—or flow, it's another word for it—it's really no secret that glaciers flow because of gravity.
众所周知，关于免费一词的争论由来已久。
Obviously, this prompted a long discussion about the word free.
他们的想法总是，这个要免费那个也得免费。众所周知，关于免费一词的争论由来已久。
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