Research and Development are also very busy? They're testing the new prototype.
研究和开发部也很忙，他们在测试新的样车。
The testing of the prototype machine is complete and modifications are in train.
样机的试验已结束，改型工作准备就绪。
The testing of the prototype machine is complete and modifications are in train.
样机的试验已结束，改型工作准备就绪。
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