平均时间

Bill climbs a two-mile hill at an uphill speed of two mph, spends no time at the top, and immediately walks down at six mph. What is his average speed for the up and down trips?

比尔爬一座两英哩的小山，他以每小时两英哩速度上山，没花任何时间在山顶上，就迅速地以每小时六英哩的速度下山，请问他上下山平均速度是每小时几英哩？

Silver prices remained under pressure for most of 2000, averaging $4.95 per troy ounce.

2000年大部分时间白银价格继续承压，平均为每金衡制盎司4.95美元。

The parameters of CT perfusion include blood flow,blood volume,mean transit time and permeability surface.

测定病变的血流量、血容积、平均通过时间和表面渗透性。

The computer-aided B+M-mode ultrasonography was used to assess their tongue movements. Duration, magnitude and speed of tongue movements in different swallowing phase were measured from 112 healthy adult volunteers and compared with their dentofacial morphology using a simple correlation analysis.

选取112名健康的成年志愿者为受测对象（男性74位，女性38位，平均年龄为22岁），以电脑辅助B模式结合M模式口腔超音波防震扫描技术评估吞咽时舌头的运动情形，计算舌头在不同吞咽分期的运动持续时间、运动振幅以及速度，并以简单相关分析法求得与齿颜面形态的相关性。

In this paper, a full flow model is given for calculating the average residence time of molten steel in non-symmetry multi-strand tundish to analyze flow pattern, the model is as follow:〓 The model can be used to calculate the volume fraction of the dead area、the piston flow and the mix flow, and is satisfactorily applied to the water model of three-strand tundish of Guangzhou Steel Works to analyze the data of the experiment.

本文认为在研究中间包内高温钢水的流动问题时，应该考虑钢水密度变化这个条件对钢水流动的影响，这样其结果更符合实际钢水流动规律。本文针对非对称多流中间包，提出了全流量模型计算多流中间包钢水平均停留时间：〓该模型也能够很好地计算多流中间包的死区、活塞流区、全混流区体积分数。

According to the facts of the influence on students' satisfaction of web-based learning, we found out that student's average participation hour in web-based learning has positive correlation on the learning satisfaction. It shows the more participation in web-based learning, the higher satisfaction of web-based learning.

二、於影响国立空大学生网路学习满意度的因素中，学生背景构面其分析结果显示学生每周参与网路学习的平均时数与学习满意度呈正相关，表示学生参与网路学习的时间愈久，学期数愈多，则对网路学习的满意度就愈高。

This design controlled member is an electric heating stove, adds through the control in the resistance wire beginnings and ends voltage operating time operating time, comes the average power which outputs to the resistance wire to perform to control.

本设计的控制对象为电加热炉，通过控制加在电阻丝两端电压的工作时间，来对电阻丝输出的平均功率加以控制。

This design controlled member is an electric heating stove, addsthrough the control in the resistance wire beginnings and endsvoltage operating time operating time, comes the average powerwhich outputs to the resistance wire to perform to control.

本设计的控制对象为电加热炉，通过控制加在电阻丝两端电压的工作时间，来对电阻丝输出的平均功率加以控制。

In the 1970s, CIE recommended two approximate uniform color space and the seeastigmatism formula, that is, CIE Lab and CIELuv.

七十年代洋，CIE保举了两栽类似平均的色不时间及反响的色差公式，即CIE Lab和CIELuv 。

Analysis of residence time profiles indicates complicated flow pattern for single-pass flow.

得到的等平均停留时间分布图表明，单溢流塔板上液体流动型式相当复杂。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。