达尔文一生都有在衣服口袋里装硬皮小笔记本的习惯，他过后会将记在小笔记本上的想法和观察记录誊写到大一些的笔记本中。
All his life Darwin carried small hard notebooks in his pocket, later transcribing thoughts and observations into larger books.
我们决定有硬皮精装本的就不留平装本的，但平装本上有批注的则另当别论。
We decided that hardbacks would prevail over paperbacks unless the paperbacks contained marginalia30.
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