Introduced some commonly used defensive measure.

介绍了一些常用的防御方法。

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Basically, the risk-defensive measure refers to the policy-perfecting and institution-formulating; while the modern risk managerial approach mainly means the animal husbandry insurance.

风险防范措施主要是指一些政策的完善和制度的建立，而风险的现代管理措施主要指畜牧业保险。

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As each new defensive security measure is implemented, it will change the current security posture and subsequently the potential opportunity costs.

每当实施一种新的防御安全措施时，它将会改变当前的安全状况以及紧随其后的潜在的机会成本。

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