1.在Introduction里面经常会使用到的一个句子：很多文献已经讨论过了
Solar energy conversion by photoelectrochemical cells has been intensively investigated.
2.值得注意的是…
It must also be mentioned that…
It is important to highlight that …
It is worthwhile mentioning that …
3.正如下文将提到的…
As will be described below（也可以是As we shall see below）,
…will be further discussed below.
The observation of nanocluster spheres at the ends of the nanowires is suggestive of a VLS growth process (see below)
4.什么东西还尚未发现/系统研究
have not yet been realized.
There are relatively few studies devoted to…
5.考虑到…
Taking the above observations into account,
taking into account
6.本项研究的意义/亮点在于…
Our research extends the knowledge into…
This research extends our knowledge of…
7.重点在于
The key to …is…
The development of sustainable energy solutions represents one of the most important scientific and technical challenges of our time, and heterogeneous catalysis is at the heart of the problem.
Particular emphasis is placed on …
8.一篇论文不可能把所有需要研究的内容都搞清楚，那么在文章中如何委婉地表述某些内容并不是本文的关注重点？
Although a detailed investigation of these factors is beyond the scope of this work, we acknowledge that the V(motif) represents an upper bound of the equilibrium active site coverage for the specific materials we have considered.