This means that over generations their brains have grown bigger as they think in new ways about how to survive.
这意味着，这些鸟类由于思考如何生存下去的新方式，而又经过数代的繁衍，它们的大脑已经变得更大。
For many conservatively minded Britons, the possibility of their family losing caste over generations is an alarming one.
在许多思想保守的英国人看来，家庭社会地位可能一代不如一代，这种局面足以让人忧惧。
China and the Philippines are neighbors facing each other across the sea, and the two peoples have enjoyed friendship over generations.
中国和菲律宾是隔海相望的近邻，两国人民传统友谊深厚。
Economic progress must also be environmentally and financially sustainable over generations.
经济进步还需要在环境上和财政上具有可持续性，延续到子孙后代。
Where power has been exercised over generations, a kind of hereditary incorruptibility grows up.
有的连续几代人握有实权，但仍相继保持某种廉洁之风。
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。
You've read them before and these health tips have been passed down over generations, but do they really work?
你对此已有所耳闻，这些保健诀窍已经流传了好几代，但是它们真的管用吗？
Later on, this craft was introduced to the folk communities, so that it could be passed on over generations and last till now.
后来这项工艺渐渐传入民间，才得以年复一年传承至今。
Yet my old friend has touched, however delicately, on that other truth about a country scattered over generations and geography.
但我的老朋友很微妙地触及了另外一个事实，即这个国家一代又一代的人散布在天南地北。
Having handed over generations after generations, this type of handicraft is extremely popular in China as well as the whole world.
这种形式的手工艺代代相传，现在已经在中国和世界各地越来越受欢迎。
Having handed over generations after generations, this type of handicraft is extremely popular in China as well as the whole world.
这种形式的手工艺代代相传，现在已经在中国和世界各地越来越受欢迎。
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