preservation methods

• 保存方法

preservation methods的用法和样例：

例句

1. Conservation methods will also help meet their energy needs.
   能量保存方法也会有利于满足其能源需求。
2. Being sensitive to desiccation and low temperature, the recalcitrant seeds can not be stored with conventional methods.
   由于顽拗性种子不耐脱水且对低温敏感，常规保存方法难以达到长期保存的目的。