period of circulation的意思|示意

Through the analysis of the long series data, the variety of natural flow of the Yellow River has obviously plentiful and withered circulation period, the length of the period is unsteady;

对长系列资料分析表明，黄河干流天然径流量多年变化有着明显的丰、枯循环周期变化，其周期长度并不稳定；

Traveler's checks are generally of small face value, such as ten or twenty dollars, five or ten pounds, for miscellaneous payments. There is no time limit of their circulation period.

旅行支票通常是小面额，比如十、二十美元，五、十英镑，用于零星支付，在流通中没有时间限制。

However, during the period of circulation use of scrap steel, it causes the content increase unceasingly of the low melting point metallic elements such as Pb in the steel.

但在废钢的循环使用过程中，不可避免地将铅等低熔点金属带入到炼钢炉中。

Years in the making, a complex new set of rules for measuring newspaper circulation officially launched with the release today of results for the six-month period that ended March 31.

制定一套新的复杂的评定报纸发行量的规则，发布规则并公布六个月试用期的实行结果的过程历经了数年，终于在3月31日结束了。

During the whole of gestation period, the nutrition of fetus is ingested by the blood circulation between maternal and fetus.

在整个妊娠期间，胎儿的营养摄入主要是通过母子血液循环获得的。

During the follow-up period of 28 years, half the women died, including 916 (51%) from diseases of the heart and circulation and 487 (27%) from cancer.

在这28年随访中，已有一半的女性参与者死亡，其中916位(51%)死于心脏和循环类疾病，487位(27%)死于癌症。