上证国债指数存在一个易变性变动的平均周期，约为20天。

An average cycle which is about 20 days was discovered in the time series of SSE T-Bond Index.

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测定血液流变性；测定氢化可的松肾虚小鼠游泳时间、脏器指数等。

Kidney hydrocortisone injection to establish a mouse model to determine their swimming time, organ index.

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据此衡量(此指数具有易变性)，与去年同期相比(见图表)，房价下跌了3.8%。

By this (volatile) measure, prices fell by 3.8% compared with a year earlier (see chart).

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