众所周知，要写出清晰流畅的文章，需要把文章中各部分巧妙地连接在一起。这样可使文章自然而引人入胜，并能层层展开主题，完整地表达我们要论证的假说。要把各个语句内容流畅的连接起来，就需要过渡词作为纽带。过渡词是一种关系指引词，一般由副词或起副词作用的短语承担，过渡词能使文章启、承、转、合，融会贯通，连成一体。我们前面几讲讲到的递进关系（interestingly, significantly, in addition to, surprisingly）、转折关系（however, while, yet, on the contrary）、因果关系(because，as for，since，therefore, so, as a result, due to)和总结关系（in a word, in short, briefly, in brief, to sum up, in summary，to summarize，in conclusion，to conclude, together, taken together）的写作，都是通过巧妙应用过渡词，使得文章的逻辑关系更加紧密清晰。与此同时，这些过渡词还起到了提示词的重要作用，在文章表达的关键时刻，提示读者“这里是很重要的内容，请仔细阅读”。

我们看下面两段话：

1. ABC was identified as a scaffolding protein in the cytoplasma. The role of ABC in gastric carcinogenesis was not fully studied. This study explored its molecular mechanism and clinical diagnostic values in gastric cancer. ABC level was found decreased in patients' tissues as compared to control. ........This study revealed that ABC signaling is vital for carcinogenesis regulation. It provide a potential therapeutic target for intervention of gastric cancer.

2. ABC was identified as a scaffolding protein in the cytoplasma. However, the role of ABC in gastric carcinogenesis was not fully studied. Here, in this study we explored its molecular mechanism and clinical diagnostic values in gastric cancer. ABC level was found decreased in patients' tissues as compared to control. ........ In conclusion, this study revealed that ABC signaling is vital for carcinogenesis regulation. Therefore, it provide a potential therapeutic target for intervention of gastric cancer.

从内容上看两段话没有不同，但是从读者的角度，我们很容易发现，第二段话给读者的印象会更深刻。我们很容易能从第二段话中发现作者做该项研究的原因，结论，以及该工作的重要意义，从而认为第二段话所在的文章是一篇好文章，而第一段话则是不那么好的。对比于这两段话只相差四个词的不同，第一段话给读者（它的第一个读者多半是编辑或者审稿人）带来的不方便，很可能导致拒稿和杯具。。。。因此，在科研论文写作中，及时加入提醒读者注意的提示词尤为重要。

除了之前讲过的几种逻辑关系表达能用到提示词，还有下面几种情况，也可以用到过渡词来起到提示读者的作用：

（1）表达并列关系的时候: and, also, as well, as well as，or, too, not only....but also, both„ and, either „ or, neither„nor

（2）表达结果或强调结果的时候: so, thus, therefore, as a result, so that, then, thereby, hence, so…that, such…that

（3）表达或强调需要某种条件的时候: if, unless, on condition that, as/so long as

（4）表达时间先后关系的时候: when, while, after, before, until, as soon as, later, afterwards, soon, lately, recently, since, from then on, eventually, in the meantime, then, suddenly, at the same time, next, early this morning / year / century, after a while, in a few days, now, presently, finally, at last, all of a sudden, form now on, at present, immediately, the moment

（5）表达特定的顺序关系的时候: first, firstly, second, secondly, third, thirdly, above all, first of all, then, next, finally, in the end, at last, afterward(s), meanwhile, thereafter, last, finally, eventually

（6）表达换一种方式表述的时候，一般用来解释前一句话: in other words, that is to say, to put it another way

（7）表达将要进行举例说明的时候: for instance, for example, like, such as

（8）表达陈述事实的时候: in fact, actually, as a matter of fact

（9）表达强调（某句话重要性）的时候: certainly, indeed, above all, surely, most important

总之，我们在写作自己的科研论文时，要注意在适合的地方用适合的表达逻辑关系的语句，并且及时使用恰当的过渡词或提示词来提醒读者注意，最终达到方便读者理解，增加文章可读性的目的，一篇读者喜欢的文章总是容易中稿而且被接收的。