If the machinery were not maintained properly, It would get rusty as time passes.
机器要不好好养护，久而久之就要生锈。
High reliable power supply module parallel connection system will not achieve (even lower) the reliability level that it should have if it is not designed and maintained properly.
电源模块并联馈电是高可靠系统，设计或维修使用不当，不但不能发挥其高可靠性水平，而且还会进一步降低系统可靠性。
Because it has the ability to absorb foreign materials, it will yellow over time if it is not properly maintained.
因为它有吸收外界物质的能力，如果不妥善保管的话就会泛黄。
If air-conditioning system is used, care should be taken to ensure sufficient fresh air to be introduced into the system, and the system should be properly cleaned and maintained.
如果采用空调系统，则应确保有足够的新鲜空气引入及保持系统有适当清洁和维修保养。
There are many simple options, if properly constructed and maintained, that will meet all public health requirements.
系统的建立有很多简单的选择，只要适当的建立并维护就能符合公共健康需求。
If properly stored, this wine's best flavor can be maintained for up to five years.
如果保存得当，这款酒的最佳风味可维持长达五年。
If properly stored, this wine's best flavor can be maintained for up to five years.
如果保存得当，这款酒的最佳风味可维持长达五年。
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