law of diminishing returns; law of diminishing marginal returns
income, obtain, reap, pay, supply, store
シュウ / おさ.める
harvest, reap
カク / —
relay, in turn, sending
テイ / かわ.る
dwindle, decrease, reduce, decline, curtail, get hungry
ゲン / へ.る
method, law, rule, principle, model, system
ホウ / のり
rule, law, follow, based on, model after
ソク / のっと.る