改良了
improved
以上为机器翻译结果，长、整句建议使用 人工翻译 。
他和他的团队继续研究并改良了杂交水稻。
He and his team continued the research and improved the hybrid rice.
youdao
由于一些理由，O MG改良了UML。
There were a couple of reasons that the OMG improved UML.
要不是这些实验，这部机器也许就不可能改良了。
If it had not been for these experiments, the improvement of the machine would have been impossible.
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