初学者写SCI论文最常见的问题是论文的句子连贯与逻辑和整体逻 辑不清楚。

     (1) SCI论文中句子的连贯与逻辑：从语言内部来说，语句或段落 都是一些意义相关的句子通过一定的承接手段合乎逻辑地组织起来的语义整体。如果一组意义相关的句子不通过一定的转折词或连接词合乎逻 辑地联系起来，这组句子就难以构成篇章。连接词是指在论文中用来说 明上下句或前后句两个意思之间关系的词或词组。连接词通常用于开 篇，发表论文引出扩展句；也可用于句中，尤其是用于较长的复杂句子中，以 作为上下文的连接纽带；还可以用于文末或段末，用于总结上文或结 束本段内容。有了适当的转折词和连接词能使句与句之间脉络清晰、 条理自然，帮助读者理解论文的思路。常见的转折词和连接词可以用 来表示：

>平行或递进关系。

and   also

as well (as)

in addition (to)

cit the same time

likewise

besides

moreover

both ... and ...

_

similarly

furthermore象still

表示转折关系。

although

otherwise

but to the opposite

however

while

nevertheless

yet

on the contrary 表示目的或因果关系。

as since as a result

so

because (of)

so ... that ...

consequently

such ... that ...

due to

therefore

for

thus now that

>表示列举关系。

for example

for instance

?for one thing

>表示层次、顺序关系。

?first, second, third, last

_ firstly, secondly，thirdly，finally (不推荐）

the first, the second, the third，the last

in the first place, in the second place, in the third place, lastly

to begin with, then, furthermore，finally

to start with, next, in addition, finally
first and foremost, besides，last but not least

most important of all, moreover, finally

on the one hand, on the other hand (适用于两点的情况）

for one thing, for another thing (适用于两点的情况）

>表示解释说明关系。

in other words that is

>表示归纳、总结。

as a result

briefly

in a word

in brief

in short

正确搭配转折词和连接词能使句子连贯、逻辑性强（示例23-18)。

on the whole _ to sum up

in summary _ collectively

taken together

for another

such as

示例23-18用转折词和连接词书写Discussion的范例

We show here that protein X similarly has role in , demonstrating

the function of protein X as an . In addition, the fact that cell

formation could be inhibited by protein X further proves the requirement of protein X in cell proliferation. Moreover, ^hen_pr〇tein X is over- expressed...，cell.... FurhtermoreT...

Interestingly, our present data show that protein X synergize maximally within a narrow concentration range, in a manner similar

to that Dr. AA described in the (Ref). It therefore possible

that the range of effective protein X concentrations de ermines the . In contrast to our results, previous>studies( ief) showed

that protein X is r

ot sufficient to stimulate cell prolife ation. This

difference might ielate to the methodusedyltispossibl :that...(Ref)

　　The finding that protein X is detected in the stem cells supports the idea that this protein X contributes to the . However,

since we have not yet been able to detect expression of protein

isolatedvsingle cells, it remains unclear which cells are the

cells, m

Xin signaling

　　(2) SCI论文中段落布局的整体逻辑：经常我们要叙述一个问题的 几个方面。这种情况下，一定要注意段落之间的逻辑结构。把你的想法 按照逻辑顺序组织，或至少应按秩序排列，将各段落有机地整理在一起 (示例 23-19)。

     示例23-19用连接词书写Results的范例

     To investigate whether X could have a role in SVZ neurogenevsis in

the adult brain,we first analyzed the expression of the X

     We next tested the effects of X on the formation of neurons in SVZ cells plated onto astrocyte monolayers in a defined,serumrfree medium ?…

     To explore the role of X on SVZ cells, we then plated dissociated postnatal day 5 SVZ cells on a quiescent astrocytic monolayer in the absence of exogenous growth factors

     Finally,to determine if any neurogenic effects of X after brain inju-ry,we generated

　　除此之外，还要注意句子之间的连贯与逻辑（示例23-20)。

     示例23-20

　　　　　uThe present paper reports an association between polymorphisms of the VDR gene and bone mass. Bone mass was measured by DEXA densitometry ...，”第一个句作者陈述他们的目的，然后描述了测量方法。 表达不连贯。该段可写成：“The association between polymorphisms of the VDR gene and bone mass is unclear. The present study was designed to assess the magnitude and direction of this association. Bone mass was measured by DEXA densitometry …”则更理想。

　　总而言之，用好转折词和连接词能使句子连贯并具有逻辑性，文章 层次清楚、意思明确。