首先

First you estimate their age by their appearance and mannerism .

首先，你从他们的外貌和言谈举止估算年龄

First of all, I want to say sorry because this name is given by me.

首先，我要说对不起，因为这个名字是给我。

First, you should know that most lawyers charge by the hour.

首先，你应该知道，大部分的律师费由每小时。

First of all, you have a great chance of getting a cheap cruise by searching the Internet for last minute deals.

首先，你有个很好的机会获得便宜的巡航导弹搜索互联网最后一分钟的交易。

First, and most importantly, I should state that this is by no means a tutorial for beginners.

首先，最重要的是，我要国家，这是决不是一个补习初学者。

But it is important to understand, to begin with, that literature lives by virtue of the life it embodies.

但是，重要的是，首先，理解文学是因它所体现的生活而存在的。

First of all, it is important to remember that the forces generated by archwires are determined by two factors: 1 wire size and 2 wire deflection.

首先，重要的是要记住的力量所产生的弓是由两个因素： 1 ）线的大小和2 ）钢丝挠度。

First, it can be a by-product of the 3:2 pulldown conversion.

首先，它可以是一个按3：2下拉的转换产品。

First, you must understand the difference between bytes and characters.

首先，你得了解在字节和字符之间的不同。

First, the article analyses the current situation of the Wide Band transmission optical network of Metro and put forward its target of next development. And it continues to talk about the key technology of the Wide Band transmission optical network of Metro: optical caber, MSTP, DWDM, RPR and make comparison with them. It offers the general plan of construction of the Wide Band transmission optical network of Metro.

首先，本文分析了目前宽带城域光传送网的现状，提出了下一代城域光传送网的发展目标，论述了城域光传送网中的主要关键技术：光纤直连、多业务传送平台、城域波分、弹性分组环，并对这几种技术进行了对比分析，提出了宽带城域光传送网总体建设方案。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。