This paper gives a brief analysis of Liu Er's life and achievements, dividing his life into six periods, and examines the teacher-student relationship and relative problems.

本文对刘鹗的生平、业绩进行了扼要的述评，将其生平划分为六个时期，并对刘鹗的师承关系和相关问题进行了研究和探讨。

youdao

Each school day has six periods with a ten minute recess between.

每一个上课日分为六节，中间各休息十分钟。

youdao

The process of the adventitious root formation in grape cuttings can be divided into six periods.

不定根的形成过程可以分为六个时期。

youdao

Sadness increased the risk nearly six percent compared to periods with no such feelings.

VOA: special.2009.03.24

It's not forever because it terminates after 2T periods of six-month interval each.

债券不是永续的,券息每六个月为一期,共支付2T期

耶鲁公开课 - 金融市场课程节选

In five out of the six periods during market turmoil, an allocation to gold preserved wealth by reducing the hit taken by the portfolio.

FORBES: Gold Shows Its Mettle In Times Of Market Turmoil

Between 90 and 95, as long as report cards show an upward trend during the six grading periods our school uses, again no interference.

WSJ: Kids and Computer Games: Keeping the Right Balance

He compared that to an investor being invested only in the opposite periods, who would have had losses in six of the 13 periods, the largest of which was 36%.

FORBES: Sell In May, Great, But Go Away For How Long?