"a prolific writer"
"a fecund imagination"
"flying foxes are extremely prolific"
"a prolific pear tree"
"fertile farmland"
"a fat land"
"a productive vineyard"
"rich soil"
The soil..was fertile and needed only water to make it productive.
出自:A. J. ToynbeeThe sense of injustice arising from gross inequalities..is a fertile source of discontent.
出自:A. BevanThe number of children that a fertile couple have depends on..the efficiency of the contraceptive methods they use.
出自:Lancet