该冷电弧阴极在发射电流为150安培情况下已累计运行100小时以上并可继续运行。
The lifeime of the cathode at this current amounts to 100 hours and it is still capable of continuing the operation.
迄今为止，东方红三号系列卫星累计运行时间已近30年，积累了相当可观的故障数据。
By now, the working hours of DFH - 3 serial satellites had totalled up to nearly 30 years.
如果这样的代码片段在应用程序运行期间一再地使用，问题就会累计，最终导致应用程序崩溃。
If this piece of code is used over and over again in the course of application execution, problems will multiply, eventually causing an ugly crash.
应用推荐