从前有一位切石匠，他每天都会来到一座大山旁边的巨石前，切割下一块块的石板用以制作石碑或建造房屋。
Once upon a time there lived a stone-cutter who went every day to a great rock in the side of a big mountain and cut out slabs for gravestones or for houses.
当你要把一根原木切割成一块块木板时，你的锯的厚度很关键。
When you cut up a log into boards the thickness of your saw matters.
学生们用切片机将这个块切割成几个部分和那些切片的克隆。
The students used a "slicer" to cut that block into fractions and a "cloner" to copy those slices.
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