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d by chemical vapour deposition. （2）The J-V curves, which are shown in Figure 1, demonstrate the stability of the flexible solar cells.
现在分词（v.-ing）/过去分词（v.-ed）做状语，逻辑主语要和句子主语一致：Stirred for 30 min, 5 mg of carbon nanotubes was added to the solution 不对。应该把逻辑主语补充出来：After the solution was stirred for 30 min, 5 mg of carbon nanotubes was added.
实用比较级时than后面的that不可轻易省略：The specific capacity of A is larger than that of B.
用词简短，能省则省：by the use of=by using; due to the fact that=because; a number of= many, several; a large majority of=most; are found to be=are; by means of=by; despite the fact that=despite; in order to=to; it is of great importance= it is important; prior to=before; it has been reported in literature that=it is reported that, provided that=if （不绝对，有的时候为了调整句子的语气和节奏需要用不同的表达方式，《经济学人》就翻着花样的表达同一个意思，这属于比较高级的表达手法）
不要用How to句式：How to understand the mechanism is still challenging. 写成：It is still challenging to understand the mechanism.
不要使用排比句，倒装句也少用或不用：Hardly can we observe any particles in the structure=The structure has almost no particles；当然句式结构也不能太单一，一“show”到底也不行，多样化的表达还是要建立在内容丰富的基础上。
主动语态 vs. 被动语态：论文的实验部分要求一律使用被动语态（时态用过去式），因为这部分是客观陈述，并且实验的可重复性是独立于操作者的。实验部分不是实验指南，不能使用祈使句（Add 5 mL of water into the mixture）。但是正文部分，主动语态使用得越来越多，一方面是因为被动语态会让句子拗口，另一方面，主动语态可以呈现研究思路并且文章中的结论和判断的确是主观的。所以，正文部分主动语态和被动语态交替使用可以使行文更加流畅。注意，文章的主动语态第一人称是we，代表文章全体作者，除非文章只有你一个人署名。
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