All contraceptive methods have been developed through long and careful observation of the procreative process.
所有的避孕方法被長(zhǎng)期而細(xì)致地做過生殖過程的臨床觀察.
互聯(lián)網(wǎng)
"tXsXwhe reproductive potential of a species is its relative capacity to reproduce itself under optimal conditions"
"the reproductive or generative organs"