There are many gravity quantities expressed by finite spherical harmonic series expansions in the computing for geopotential.
重力场计算中，经常需要计算以有限阶球谐级数表示的重力场元。
For dealing with the electromagnetic fields near edges, an approximate scheme is developed using the series expansions and integral equations.
处理孔缝边界时，用级数展开和积分方程得到金属拐角处电磁场的近似解。
Then series expansions of multi-variable functions are applied to the derived approximations in terms of phase angles to generate the approximations in terms of group angles.
然后连续利用多元函数级数展开，导出群角表示的相速度和群速度近似公式。
Custom expansions of specific dynamic values are achieved with a series of backslash characters.
特定动态值的自定义扩展是使用一系列反斜杠字符来实现的。
Singapore was later made a crown colony in 1867 after a series of territorial expansions.
之后新加坡经历了一系列的领土扩张并在1867年成为皇室殖民地。
Singapore was later made a crown colony in 1867 after a series of territorial expansions.
之后新加坡经历了一系列的领土扩张并在1867年成为皇室殖民地。
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