通过绳子本身缠绕另外的绳子或另外一个物体的各种各样的系结物。

Any of various fastenings formed by looping and tying a rope upon itself or to another rope or to another object.

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民众抱怨水壶产生结垢，系硬水煮沸时其溶解性钙及镁形成碳酸钙及碳酸镁沉淀物所造成。

When people complain about scaling inside their water kettles, this is caused by dissolved calcium and magnesium ions forming calcium and magnesium carbonate deposits when hard water is boiled.

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