结果与结论：只有选择合适的包装材料、有效控制包装过程并严格包装标示物的管理，才能保证用药的安全性。
RESULTS & CONCLUSION: Only by selecting the appropriate packaging materials, controlling the packaging process effectively and man- aging the package labels, will the safety of drug use be ensured.
在创建系统时，必须为其部件选择合适的材料。
When a system is to be built, suitable materials must be chosen for the parts.
机械设计除了计算载荷和应力、选择合适的材料外，还包括许多其它因素。
The design of a machine includes many factors other than those of determining the loads and stresses and selecting the proper materials.
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