下面的塞子是由于长时间使用老化造成的。
The plug below is worn out from being used for a long period of time.
并用YB-2航空有机玻璃海南大气自然老化与南方飞行使用老化的数据，验证了建立的加速当量的正确性和准确性。
The accelerated equivalence was provided correctly and precisely with the data of YB-2 Perspex aged naturally in Hainan and serving in flight in the south district.
这些F - 16战机将替代智利从1976年就开始使用早已老化的F - 5喷气式飞机。
The F-16 fighters will replace the Chile's aging F-5 jets, which have been in use since 1976.
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