中国在过去的三十年经历了巨大的变化。的翻译：China has experienced great changes over the past 30 years. 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

In the past three decades China has undergone dramatic changes.

China has experienced great changes over the past 30 years.

China has experienced the huge change in the past 30 years.

In the past 30 years China has undergone dramatic changes.

China has experienced great changes over the past 30 years.