这些防洪大堤中最低的那些堤坝被建设来承受千年一次的潮汐波浪。
The lowest of those levees were built to withstand a one-in-1,000-year tidal surge.
森林仅仅燃烧一次就能留下足够的黑碳，来保持数千年土壤肥沃。
Burning the forest just once can leave behind enough black carbon to keep the soil fertile for thousands of years.
列入关注的理由：默拉皮火山属于普林尼式喷发，大约每千年大规模爆发一次（喷涌而出的岩浆总量可达1立方千米，漫天飞扬的火山灰足有20至50千米高）。
Reasons to worry: Merapi is capable of producing a Plinian eruption (spewing at least 1 cubic kilometer of magma and producing 20 to 50 kilometer-high ash columns)every 1,000 years or so.
它被一次短暂的变暖过程打断，也就是间冰段，这个过程只持续了几千年。
It was interrupted by brief warmings – interstadials – none of which lasted more than a few thousand years.
在本周五进行了一次成功的开机点火试验，而第一次核碰撞将在秋季进行，到时设备将围绕千年时间问题满功率负载运转实验。
A successful test-firing was held on Friday and the first nuclear collisions will take place in the autumn, building up to full power around the time of the millennium.
最后一次重大事件发生大约发生在十万年前，并且伴随着数千年的温度下降。
The last major event began around a hundred thousand years ago, with a gradual cooling that lasted for tens of millennia.
1万2千年前，在最近一次间冰期——弗兰德间冰期开始时，巨大的冰层退去，人们得以返回北半球。
Twelve thousand years ago, the great ice sheets retreated at the beginning of the latest interglacial – the Flandrian – allowing humans to return to northern latitudes.
这个独一无二的机会并不常见呢，在这么多千年过来你仅仅拥有这一次机会。
This unique occasion comes but once every so often, and you have not had this opportunity for many thousands of years.
由于死亡之翼的回归以及他所带来的大灾变，地精们发现他们数千年来第一次处于致命的危险之中。
With the return of Deathwing and the Cataclysm that he's brought onto Azeroth, the goblins find themselves in true mortal danger for the first time in thousands of years.
那某年某月的某一次不期而遇的因，也许是他或她当初在佛前千年万年乞求的果。
That a certain period of time of a peek into the cause, perhaps he or she had to beg the Buddha fruit of years before the millennium. That I, her tears water the fish, and he just passing through.
那某年某月的某一次不期而遇的因，也许是他或她当初在佛前千年万年乞求的果。
That a certain period of time of a peek into the cause, perhaps he or she had to beg the Buddha fruit of years before the millennium.
那某年某月的某一次不期而遇的因，也许是他或她当初在佛前千年万年乞求的果。
That a certain period of time of a peek into the cause, perhaps he or she had to beg the Buddha fruit of years before the millennium.
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