常見例句Take a lineage of microscopic marine animals known as bdelloid rotifers.Most rotifers reproduce sexually, but bdelloid rotifers abandoned sex about 100 million years ago.就拿海洋中的微小動(dòng)物蛭形輪蟲來(lái)說(shuō)，大部份輪蟲行有性生殖，但是蛭形輪蟲已經(jīng)把性丟開約一億年了。 返回 bdelloid