Synchronization is a very crucial technical problem in the space TT&C system. Besides, whether the space TT&C system can work validly and reliably or not depends on the synchronization technology.
在航天测控系统中，同步是一项关键的技术问题，测控系统能否有效可靠地工作，很大程度上依赖于同步系统性能的优劣。
Automotive engine reliability which is related to the main technical performance "when failure" problem, which is crucial to the car engine specifications.
而其中汽车发动机的可靠性是关系到主要技术性能“何时失效”的问题，这是汽车发动机至关重要的技术指标。
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