After you've finished writing on one page in the pad of paper, you can tear it off and still have the rest of the pad of paper to use.

在你完成了纸笺的其中一页时，你可以把这一页撕下来并且纸笺中还有其它的纸可供使用。

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One witness said the man approached a security checkpoint building at the northwest gate of the White House and showed a writing pad with the word "urgent" written on it.

CNN: Man sets self afire outside White House

He is sitting behind his desk, hunched over a legal pad, writing something.

NEWYORKER: The TV

Writing something on a pad, anything at all, scored points.

WSJ: Excerpt: From the Letters of George H.W. Bush