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principle of least effort in Hindi：प्रयत्न-लाघव नियम

Neighbors

"principle of invariance" sound, "principle of inversion" sound, "principle of later in evolution" sound,

"principle of later in time" sound

"principle of least action" sound

"principle of mach" sound

"principle of marketing" sound

"principle of motion economy" sound

"principle of multiple causation" sound