Confronted with a sink suddenly spurting water many homeowners have neither the knowledge nor the materials to make the repair themselves.

突然遇到水槽漏水，许多屋主自己无法修理，因为他们既没有这方面的知识也没有材料。

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Good knowledge and hand on skills of electronics system operation, repair and maintenance.

良好弱电知识和全面掌握弱电设备运行，维修和维护技能。

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Carpentry prepares students to apply technical knowledge and skills to lay out. cut. fabricate. erect. install. and repair wooden structures and fixtures. using hand and power tools.

木器专业适用于运用技术的知识和技能使用手动和电动工具编造，直立，安装，修复木结构和设备。

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Relationships are what foster sustained innovation, product or repair improvements, and the creation of new knowledge.

FORBES: Do It With Others - Maker Community Manifesto

It comes down to about 265-350 genes and the way they work together to build proteins and the other chemicals that form the organism's structure, metabolism and self-repair mechanisms could help us to fill in some major gaps in our biological knowledge.

BBC: Is life just genes?