有时是相当的交流锋利。
它有双面，两侧边缘都很锋利，而且相当对称。
It's double-sided, it has a sharp edge both sides, and it's symmetrical.
刀锋的厚度仅相当于80个原子，即发丝直径的五千分之一到一万分之一左右，比市场上的普通刀片要锋利非常多。
They are just 80 atoms thick on their cutting edge - around 1/10,000th or 5,000 times thinner the width of a hair and far sharper than any of common blades on the market.
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