what natural phenomena are measured by the Richter scale?

natural natural natural natural natural natural natural what can we do with natural disaster作文 Natural disasters on the rise what should we do what natural phenomena are measured by the Richter scale? what extent is truth the same and different in mathematics,natural science m and human science. What can we do to save our natural resources?怎么翻译? What can we do with natural disasters?(写一篇英语作文130词左右 1.how many people in quebec? 2.how many people live?3.what important natural resources ? What kinds of natural features are in your area?.(翻译成中文) compressed natural natural vitamin 翻译natural