Miles of sand are exposed at low tide.

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。

Results Compared with NS group, the contents of TC, TG, LDL, were significantly decreased and the content of HDL was increased evidently in PFH groups.

结果黄花倒水莲水提取液能显著降低血液中总胆固醇、甘油三酯、高密度脂蛋白、低密度脂蛋白的含量。

PFH could remarkably inhibit the induction-phase and attack-phase of PC-DTH in mice.

对6-三硝基氯苯诱导小鼠迟发型变态反应的诱导相、攻击相有显著抑制作用。

PFH could significantly dilate the micro-artery and micro-vein, increase the opening number of capillary in mice.

极显著扩张小鼠耳廓微动脉、微静脉，增加毛细血管开放数；

The emergence of PFH make hydraulic technology develop to a new level, and will become an advanced technology promote machinery automation.

交流液压技术的出现使液压技术发展到了一个新的台阶，并将成为促进机械自动化的先进技术之一。