首先

To begin with, the concept of a black hole is theoretical.

首先，这是一个黑洞理论概念。

First, we went bird watching. The Bird we saw most is the Black-Faced Spoonbill.

首先，我们先去赏鸟，看到最多的是黑面琵鹭。

First, select column A in its entirety by clicking the letter A at the column head, and then select Insert Columns to insert a blank column. Click in cell A2 (skipping A1 because B1 is a heading), and enter this formula

首先，点击列标题栏中的字母A，选中A列整列，然后选择插入》插入列插入一个空白列，点击A2单元格（跳过A1单元格，因为B1是标题）输入下面的公式

In the first part of the study, it was demonstrated that there was only 0.1% of PCV2 antigen-containing rate in PBL isolated from PCV2-free pigs and treated simultaneously with mitogen and PCV2. The results of both MTT assay and blastogenesis indicated that PCV2 could reduce the responsiveness of PBL to mitogen stimulation, but the results of survival and apoptotic rates indicated that PCV2 had no effects on the viability of PBL.

首先，在第一阶段实验中针对健康无PCV2带原的猪只进行测试，当同时对其PBL以致裂原刺激与PCV2攻毒处理后，其PBL中仅0.1％的细胞呈现PCV2抗原阳性；藉由MTT与blastogenesis分析，均显示PCV2可以降低PBL对於致裂原刺激的反应，然而PCV2对於PBL的存活率或细胞凋亡率则无显著影响。

Yesterday I went to jiaxing city and met an American man who teaches the Cambridge English .after that ,I have much idea in my mind .not only the height of America, but also I was shocked by the way to teach English .firstly, their demand of discipline is not more rigorous than ours.but It doesn't means I agree with this point .after all,it is just a class for interesting.and the student was so excited because of novelty.but the point I need to think is if I was too strict on the discipline.some months ago I wouldn't care how noisy as there was a blatancy in the classroom.

这个星期天去听了一节课，是一位外教的课，感受颇多。当然，那外教的身高对我的震撼，这里就不累述了。首先是，人家对课堂纪律的要求显然没有我们高。不过，这并不代表我认同这样的观点。首先，这只是一节兴趣课，其次，上课的孩子由于新鲜，话也挺多。但由此而想到的是，我有没有对课堂纪律苛求了。以前的我对这方面不太注意，其实到现在也还是放得比较宽。不过我开课的时候，有人提出，下面这么乱七八糟的，哪像上课。我的理解是，这要看学生在干什么。如果是扯山海经，那么是绝对不允许的。但如果是讨论学习问题，我是绝对同意的。

Well,first you have to mix eggs and milk in a blender.

首先，你必须把蛋和牛奶放入搅拌机内搅拌。

Even the blindest men in the world could see that in the pockets of the aged , we can turn our youhhood and beauty into easy wealth.

道理很简单：首先，比较而言，那些挥土如金的老年人，比那些百般挑剔的小白们要慷慨的多了。

First,a heavy collar on my neck,and a bridle with great side pieces against my eyes,called blinkers.

首先，是脖子上重重的轭具，还有笼头，带着一大块挡住我的眼睛的叫作马眼罩的东西。

At one level, we've written a lot of code to blit a simple bitmap.

首先，我们写了很多代码来blit一个简单的位图。

A kind of implement blue print for function block configuration software module which is irrelevant to any specific protocol and reusable is proposed, which is based upon the further study and analysis of object-oriented component design technique, the optimal path planning algorithm, XML extensible description language and some other relevant techniques.

首先，在深入研究了相关领域的面向对象组件设计技术、最优路径规划算法、XML可扩展描述语言等相关技术基础上，提出了一种基于组件技术的、与协议无关且可重用的功能块组态软件模块实现方案。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"