Crossing-over this cycle is not so easy.

跨越这个循环不是那么容易。

Advertisement crossing-over, one kind this is link means is out of shape.

广告互换，这是链接方式的一种变形。

Want to compare the cost of their crossing-over and income from social Angle.

要从社会的角度比较它们互换的成本和收益。

PAE is stable over generations and has been suggested to be caused by unequal crossing-over.

PAE突变能在世代间稳定传递，其产生机制可能为等位基因间的不等交换。

He made the crossing from Cape Town to Sydney in just over twenty-six days.

他从开普敦横渡到悉尼只用了二十六天多时间。