The first paratyphoid early clinical symptoms were mainly fever, dizzy, headache, pharyngoxerosis, pharynx-ache and dry-cough with 7-27 days of incubation period, average 15 days.

甲型副伤寒早期临床症状以发热、头晕、头痛、咽干、咽痛、干咳为主，潜伏期7 ~ 27天，平均15天。

youdao

The improved period-average-mode of the single-phase PWM VSC is set up, and the current control scheme based on the model is presented.

建立了PWM逆变器的改进型周期平均模型，并给出了基于此模型基础上的电感电流控制方式；

youdao

During this period, there was an average of sixty-three attacks worldwide each year.

VOA: special.2009.06.16

I computed the average return on stocks over that time period and I computed the average return on bonds over that time period.

我计算了那个时间段的股票平均收益率,和债券平均收益率。

耶鲁公开课 - 金融市场课程节选

And even if over a period of time the average amount of their regard is lower because they started lower and then got higher than someone who was always high, it's the ones who were first lower who then went up that capture our attention.

即使在一段时间内,他们对我们的评价依然不高,但是因为起点较低,只要是在日益改善，总比一开始就对我们评价好的人更有吸引力，正是开始低而慢慢增加的人,会引起我们的注意。

耶鲁公开课 - 心理学导论课程节选

The MACD is calculated by simply subtracting a 26-period exponential moving average (EMA) of the closing prices from a 12-period EMA. The signal line is a nine-period exponential moving average of the MACD.

FORBES: Demystifying the MACD

The MACD calculates the difference between two moving averages (typically, the 12- and 26-period), and then finds a moving average of that difference (typically, a 9-period moving average).

FORBES: The Indicator That Says Stocks Are Going Higher

Fidelity Puritan has an average holding period of about eight months, according to Morningstar, and Fidelity Dividend Growth has an average holding period of a year and a half.

WSJ: The Facebook Flip: Funds Exit Early