船底凿洞使沉 scuttle a ship
使凿
Make a chisel
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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.
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凿耕法和铧式犁翻耕法在短时间内使二氧化碳的排放增加。
Chisel and moldboard plowing increased carbon dioxide emissions for a short time.
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