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带子要绕在书脊上，两边都要留空。
The ribbon should wrap around the spine with excess on either side.
youdao
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揪住两本书的书脊并尝试将它们分开。
Hold the two books by their spines and try to pull them apart.
youdao
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揪住两本书的书脊并尝试将它们分开。
Hold the two books by their spines and try to pull them apart.
youdao