...， 对所有a b c F , , ，a b c a b a c ( ) 若一个场中的元素个数为无限多个则称为无限场(infinite field)；反之， 称为有限场(finite field)，密码理论应用中常用到有限场 无限场的例子有：实数场R、有理数场Q、复数场C 等 有限场的例子...
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infinite fluid field 无限大流场
infinite liquid field 无限域流场
semi-infinite liquid field 半无限域流场
infinite magnetic field strength 无穷大之磁场强度
infinite gas flow field 有限瓦斯流场
The first is establishing artificial boundary problem, because of simulating the infinite field from the finite field in which intercept from the infinite field, so we introduce artificial boundary.
用有限元模拟波动问题，其首要问题是人工边界的设置问题，由于要从无限域中截取有限区域来模拟无限域，所以要引入人工边界。
In a infinite and empty space the geomagnetic field falls off in strength with the third power of distance.
在无限和真空的空间中，地磁场在强度上随距离3次方而衰减。
That absolute expanse might be difficult, even unbearable, to contemplate, like an infinite snow field of time, but the conception at least carried with it the serenity of the eternal.
可能很难设想宇宙绵延无期，就像时间的无垠雪原，这种想法甚至令人难以忍受，但是这一观念至少给人以永恒的宁静感。
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