书有浅尝者，有可吞食者，少数则需咀嚼消化。
Some books to be tasted, others to be swallowed, and some few to be chewed and digested.
书有可浅尝者，有可吞食者，少数则须咀嚼消化。
Some books are to be tasted, others to be swallowed, and some few to be chewed and digested.
书有可浅尝者，有可吞食者，少数则须细嚼慢咽。
Some books are to be tasted, others to be swallowed and some few to be chewed and digested.
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