strenuous, need or exert great effort 
Belastung (sich selbst) 
sforzo (se stessi) 
se fatiguer (soi-même) 
se esfuerza (uno mismo) strenuous, need or exert great effort 13 费力 [費-] fèilì (cost-strength) strenuous, need or exert great effort: ~地往前走take the effort to move forward || 很~的事情hard work || ~不讨好 do a thankless job '| Goethebuch | Vietnamese |
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