“下定义”用英语怎么说

“下定义”的拼音为：xià dìng yì...

很难下定义.It is ill to be defined.从下定义的角度来看,证据不见得是确凿可靠的.The evidence, by definition, is not likely to be conclusive.空是无法下定义解说的, 正如最柔的东西是无法剪断的一般.Nothingness cannot be defined; t he softest thing cannot be snapped....