They release millions of eggs and sperm within a period of 20 minutes , ensuring that some young will survive parrotfish and other predators , researchers report this week in the journal of experimental biology .

为了确保他们的幼仔在隆头鱼和其他天敌中活下来，每20分钟内，他们会产出数以万计的卵子和精子。

At first I think his picture is nothing more than a huge scribble of red crayon , but when I lean in to take a closer look I see that on the bottom of the page william has drawn a rainbow-colored parrotfish .

起初我以为他的画只是一大幅红色的蜡笔涂鸦，但当我走近了仔细一看，才发现画的下面，威廉还画了一条七彩的鹦嘴鱼。