larval duration的用法和樣例：
例句
- While in their larval stage, giant clams must swim and feed in the water column.
當它們的幼蟲(chóng)期，巨蛤蚌必須游泳和喂養在水柱。 - Results Vasobral improved the development of larval and a dult stages,enhanced the vitality and increased the quantity and quality of ovum.
結果活血素能促進(jìn)家蠶幼蟲(chóng)期生長(cháng)發(fā)育，提高蛹期繭質(zhì)量，延長(cháng)雌蛾生命，并能產(chǎn)生更多卵子。
