原因主要有两个：第一，如果先优化再做兼容性，你的优化很可能破坏了兼容性。
There's two major reasons for this. First, if you optimize and then work on compatibility, you're very likely to optimize in ways that break that compatibility.
我先主要说说美国发生的事情，再说几句欧洲的事。
Let me focus mainly on what happened in the United States, then say a few words about Europe.
今天我先写这封信，主要是想让我们彼此先认识认识。
I am writing this letter today mainly so that we can get a little more acquainted with one another.
先启阶段的主要目标是在这个项目目标的基础上使涉众能够通力合作，并使他们接受这个项目是值得去完成的。
The primary objectives of the Inception phase are to achieve concurrence among all stakeholders on the project objectives, and to establish that the project is worth doing.
先启阶段的主要目标是在项目范围内的所有涉众之间达成一致，以确保项目是值得做并且是可能做的。
The main goal of the Inception phase is to achieve concurrence among all stakeholders on the project scope and to ensure that the project is both worth doing and possible to do.
在图3中的四个阶段——先启、精化，构建以及产品化——中，主要关注于不同类型风险的减轻。
Each of the four phases shown in Figure 3 — Inception, Elaboration, Construction and Transition — focus on mitigating different types of risks.
在W3C开始标准化过程之前，他们先花一部分时间征求来自W3C成员公司的反馈意见和信息，主要是有关W3C该做什么及如何做的。
Before the W3C begins work on any standardization process, they first take some time to solicit feedback and input from the W3C member companies as to what and how exactly the W3C should proceed.
在有些情况下，先完成主要功能的构建，来降低和需求相关的风险以及工作流中的不确定性，可能是有意义的。
In some situations, it may make sense to build key functionality early in order to mitigate risks related to requirements or workflow uncertainties.
我们主要关注扩展JAAS的授权组件，但开始我们先简要概述一下 JAAS 认证，紧接着看一下一个简单的 JAAS 授权操作。
We're concerned mostly with extending the authorization component of JAAS, but we'll start with a brief overview of JAAS authentication, followed by a look at a simple JAAS authorization operation.
主要的区别在于，燃料电池的化学能量能直接转化成电能而不需要先转化成热能。
The major difference between these two power generators is that the chemical energy of the fuel cell is converted directly to electrical power without intermediate conversion first to heat.
这就是为什么主要任务是先创建螺旋，然后再添加吸管的原因。
That is why the main task was to create a spiral first and then add straws.
傍晚6点，让我们先忽略这个古老城市的新城区和主要区域。
在我今天继续更新图片和昨天的录像之前，我想先澄清一个事情，因为所有的主要媒体都忽略的一件非常重要的事实。
Before I continue with some updates from today and videos from yesterday, I want to make one thing clear because all of the major news outlets are ignoring a very important fact.
进入该建筑，游客会先遇到主要的音乐厅或表演厅、会议室和黑盒剧场。
On arrival, the visitor encounters the main concert or performance hall, the conference rooms, and the black- box theater.
工件的主要表面，装配基面应先加工，从而及早发现毛坯中主要表面可能存的缺陷。
The main surface of the workpiece, the assembly surface should be first processing, thus early detection of defects in the workpiece surface may be the main.
所以每天的工作，开始前应先拟定概略的时间表，其中特别注意希望完成的数件主要工作。
So you should plan a brief schedule everyday before working, especially on some main things which you hope to finish.
比如在澳大利亚，外国人面对的最主要限制是必须先获得当地外资检讨局的批准，才可进行买卖。
For example, in Australia, the main constraints faced by foreigners is to obtain the approval of the local foreign investment review board before they can be traded.
本文先通过对负债经营的主要风险以及负债风险的成因进行分析，然后针对负债经营企业如何防范和控制负债风险提出了几点建议。
This article, by analyzing the main risk of operation with debt of business and the contributing factors of debt risk, makes some proposals on how to take precautions against and control debt risk.
我准备先概述一下，然后讲一下梅兰妮。克莱因在1957年出版的《嫉羡与感恩》里的一些思想，然后主要讲一下克莱因的技术。
I am going to present a summary and then some thoughts on Melanie Klein's paper "Envy and Gratitude", first published in 1957, and more generally on Kleinian technique.
连下多日的雨终于停了，今天终于见到太阳，连鱼缸里的鱼儿也开始活跃起来，等下我们也要出去转转，再买点家用，最主要是晒晒太阳先。
The rain passed off, and I saw the sun today. The fishes in bowl became active. We will go out and buy some household supplies, mainly we need to enjoy sunshine.
擒贼先擒王，我们把主要矛头直接对准美国。
They follow the leader, we mainly directed against the United States of America.
“私有协议”的知识产权政策则主要体现在技术推广过程中的“先松后紧”的政策。
The policy of intellectual property of "Private Convention" mainly shows as "first loose and then tight" during enforcing the patent technique.
这项研究是由辉瑞公司发起，分类上称为他达拉非、艾力达或伐地那非，主要由葛兰素史克公司，拜耳公司和先灵葆雅公司销售，工作方式与伟哥类似。
The research was funded by Pfizer Inc, known generically as tadalafil, and Levitra or vardenafil, sold by GlaxoSmithKline, Bayer ag and Schering-Plough, work in a similar way to Viagra.
确诊则主要依据病原学检先。
我们先参观圣乌而利赫小镇的一些主要街道。
Our route began with walking through a few streets of St. Ulrich, a small tourist town.
我先不想找工作，主要是不能面对失败，鸵鸟哦？
I will not to find a work, the main is not the face of failure, ostrich oh?
我先不想找工作，主要是不能面对失败，鸵鸟哦？
I will not to find a work, the main is not the face of failure, ostrich oh?
应用推荐