前言

He set forth on a three-month trip around the world.

这位作者在他的前言中阐述了写这本书的理由。

Based on the principle of molecular emission in hydrogen flame,sulphur-containing and phosphorus-containing substances in solutions were determined directly using self-made apparatus.

1前言硫化合物如甲硫醚等是造成环境水体中恶臭污染的主要原因之一[1]，同样磷是有机磷农药、磷肥的主要成分，也是环境水质监测中的重要元素。

Based on the tests of rolling and drawing alloying wire, the good structure and properties of large gauge highcarbon steel wire are obtained by adding a certain amount of Cr to steel.

1前言近20年，国际上预应力钢丝，钢绞线广泛用于高速公路、大跨度桥梁、高层建筑等工程上，其发展方向是大规格、高刚度、低松弛、耐腐蚀、大盘重。

Turning the dish drives to usually adopt the machine method,because the machine drives of spreading and moving the chain is long,spreading to move the parts many,spread to move the device complicated,on the some special artesian well equipments,will often appear whole machine set arrange the difficult circumstance,and host weight over big,affect the host moves to carry function.

0前言转盘是钻机或修井机旋转系统的主要部件，把发动机的旋转运动通过减速机构变为垂直旋转运动。转盘驱动通常采用机械方式，由于机械驱动的传动链长，传动部件多，传动装置复杂，在一些特殊的钻井设备上，常会出现整机台面布置困难的情况，且主机重量过大，影响主机的移动性能。

The direct electrochemical behaviors of sodium nitroprusside in physiological medium on glassy carbon electrode have been investigated in this paper.

1前言硝普钠(Sodium Nitroprusside，SNP)，化学名称为亚硝酰基铁氰化钠，是一种理想的快速降压药物。

The sitting height of 383 fetuses (219 male,164 female)of Guangzhou area was measured every week.

前言 判断胎儿发育是否正常是优生优育的临床工作的起点。

The rock-drilling jamming mechanism of down-the-hole drill is discussed.

1前言在潜孔钻机凿岩钻孔中，经常发生卡钻事故。

A comparative study on broken rice rate in rice milling between rice mill and lab was conducted.

前言碾米过程的碎米发生与稻谷性质碾米工艺设备条件等众多影响因素有关，要在保证大米加工品质的条件下尽量降低碎米率提高出米率，这是我国碾米工业需长期面对的挑战和难题〔1- 2〕。

Based on the analysis to the present situation of the ceram ic s furnaces in our country,this paper bring up the energy-saving problem of batch furnaces.

1前言在陶瓷生产过程中，烧成是关键环节，产品质量的好坏，取决于烧成工序，可以说窑炉是陶瓷工厂的心脏。

The Bobbio, completely Romanized from the Preface onwards, does not include one among its variables.

该比奥，罗马完全从前言起，不包括之一的变数。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。