鲁尼从来就不是那种盘带类型的球员，不过他可以专注于自己那敏锐锋利的第一脚触球以及比对手更好的拿球虎护球能力，也使他变得很有杀伤力。
Rooney will never be this sort of player, but he could work on a sharper first touch and take on opponents more, which would make him more dangerous.
为了使凿刀和刨子好用且安全，必须保证他们的刃足够锋利。
Keeping a sharp edge on chisels and plane irons is absolutely necessary for the successful and safe use of these tools.
采用薄刀分切（厚度仅为1毫米）、设有自动、手动砂轮磨削，保持刀刃锋利，使分切的纸板平滑整齐；
Thin edge(about 1mm thickness)slitting with automatic and manual grindstone grinding to keep edge sharp and make slit paper smooth and tidy.
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