We had to stop every few miles.

She thinks nothing of walking thirty miles a day.

她认为一天步行三十英里不足为奇。

I'm not walking ─ it's miles away.

我不会走着去的——太远了。

The river is 300 miles in length.

这条河长300英里。

Miles of sand are exposed at low tide.

在低潮时数英里的沙滩就会显现出来。

They followed the line of the river for three miles.

他们沿着那条河走了三英里。

It's two miles to the beach.

距离海滩两英里远。

Walking four miles in an hour is pretty good going for me.

一小时走四英里对我来说是相当不错了。

The village lies five miles due north of York.

这个村庄位于约克正北五英里处。

It's 30 miles round trip to work.

上班要走往返30英里的路程。

Keep straight on for two miles.

一直向前走两英里。

Who was the first person to run a mile in under four minutes?

是谁第一个用了不到四分钟跑完一英里？

This paper refers to the development research and site test results of PDW-ⅱ type sewage disposal machine in petroleum drilling.

本文介绍了PDW-Ⅱ型石油钻井污水处理机的开发研究及现场试验结果。

The reference levels of platelet were lower in men than in women except for the parameter of PDW.

血小板系各参数低于女性，而PDW高于女性；

Clinical Study on Relationship of MPV, PDW and Blood Stasis Syndrome

血小板体积及分布宽度与老年病血瘀证关系的临床研究

Development and Application of PDW-ⅱ Type Sewage Disposal Machine in Petroleum Drilling

PDW-Ⅱ型石油钻井污水处理机的研制与应用

Clinical significance of detection of PDW in coronary heart disease

血小板分布宽度在冠心病检测中的临床意义

Studies on Changes of RDW and PDW in Patients with Acute Hemorrhage Pre and Post Transfusion and Pre and Post Chemotherapy of Lung Cancer

急性失血输血前后及肺癌化疗前后的红细胞和血小板分布宽度比较

The simulation software is designed based on modularization method. It can fulfill the function of scene setting, PDW production, pulse sort and overlapping disposal.

论文采用模块化的设计思路对模拟器软件进行了开发，仿真软件能完成场景设置、脉冲描述字生成、多信号脉冲排序、脉冲重叠处理等功能。

It is concluded that PFH is obviously related with umbilical cord around body, macrosomia, abnormal pelvis and placenta low implantation, and this may lead to a higher rate of dystocia and CS consequently.

发现初产头浮主要与脐带缠绕、巨大胎儿、骨盆异常和胎盘低置有关，且增加难产和剖宫产机率。

Pulsating flow hydraulic ( PFH) system which transmit power and signal with the oil reciprocating vibration in the pipeline are common used in the mining, metallurgical, construction, manufacturing, scientific experiments and other industrial equipment.

油液在管道内以往复振动的形式传递功率和信号的交流液压系统常见于矿山、冶金、建筑、制造、科学试验等工业设备中。