E1R1G2
4 points
ERG is validvalid
a unit of work or energy [n ERGS] / an area of shifting desert sand dunes [n AREG]
a unit of work [n -S] / a Saharan area of shifting sands [n AREG]
a unit of work or energy [n ERGS] / an area of shifting desert sand dunes [n AREG]
a unit of work [n -S] / a Saharan area of shifting sands [n AREG]