这是美国官方首次对5月25日地下核试验的性质发表评论。
It was the United States first official comment on the nature of the May 25 underground test.
强降解试验的性质取决于单个原料药和涉及的制剂的类别。
The nature of the stress testing will depend on the individual drug substance and the type of drug product involved.
欧盟的扩员一直带有试验的性质，进入一片未知的领土时，一定要步步为营才是上策。
EU enlargement was always something of an experiment: it may be poised to enter uncharted territory.
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