The effect of diffusion on the permanence of the population in a polluted patch is studied by setting up a single population diffusive system in two patches.
文中所考虑的是污染斑块上外界毒素的输入量存在极限值的情形 ,得到如下结论 :无扩散时 ,若此极限值超过某一定值 ,则污染斑块上的种群趋于灭绝 ;扩散存在且两斑块上种群的扩散系数满足一定的条件时 ,则可使该系统的种群永久生存或灭
The Effect of Diffusion on the Permanence of Smith Population in the Polluted Patch;
文中所考虑的是污染斑块上外界毒素的输入量存在极限值的情形,得到如下结论:无扩散时,若此极限值超过某一定值,则污染斑块上的种群趋于灭绝;扩散存在且两斑块上种群的扩散系数满足一定的条件时,则可使该系统的种群永久生存或灭绝。
Equally or jointly eternal.
永远并存的相同地或共同地永存的
Keep the principles of liberty alive.
使自由的原则永存。
Literature is the immortal part of history;
文学是历史的永存部分；
Grace will last, beauty will blast.
美貌会枯蒌，优雅将永存。
The friendship between the two peoples is everlasting.
两国人民的友谊永存。
a landscape with a timeless quality
价值永存的风景画.
The heroic deeds of the martyr live for ever.
烈士的英雄业绩永存。
The king is dead; long live the king.
国君虽亡，王位永存。
Endless life or existence.
永存无穷尽的生命或存在
Having the ability to resist decay or failure; lasting.
不易损坏的，永存的有能力抵抗腐朽或失败的；永存的
By the same token,the everlasting interdependence is actually an everlasting love.
正如，永远的依存，也是永远的爱。
quick-access form of permanent file
永久文件快速存取形式
His name shall endure for ages.
他的名字将永世长存。
semipermanent electronic storage
半永久性电子式存储器
nonvolatile memory [ storage ]
固定[永久性]存储器
permanent filing of working paper
工作底稿的永久存档
Books do not last forever.
图书不能永久保存。
store in a deepfreeze, as for conservation.
低温保存以便永久保持。
