The 3-d first break refraction static corrections adopted time-term technique has difficulty in solving large-scale set of equations because of ill-conditioned property of set of equations.
采用时间项技术的三维初至折射波静校正方法在求解大型方程组时由于方程组的病态性质将遇到困难。
All the bonds in a particular issue may mature at a specified time (term bonds), or they may mature in installments over a period of time (serial bonds).
一次发行的所有债券都在一个特定日期到期的债券叫定期债券；在一段时期内分批到期的债券叫做分期还本债券。
All the bonds in a particular issue may mature at a specified time (term bonds), or they may mature in installments over a period of time (serial bonds).
一次发行的所有债券都在一个特定日期到期的债券叫定期债券；在一段时期内分批到期的债券叫做分期还本债券。
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