Poorly written cover letters are like letters without stamps – they won’t get you anywhere.
糟糕的求职信就像没有邮票的信件——它们无法达到你的目的。

While there are no hard and fast rules about how to write cover letters there do are standard and generally accepted practices to write a notable cover letter.
虽然写求职信没有要严格遵守的规则，但一封拿得出手的求职信还是有些标准和套路的。

Firstly, it is important to remember that a cover letter is not a job application. It is short note that accompanies your resume or portfolio and should include:
首先，要记住求职信不是职位申请书，只是一篇和简历及相关资料一起附上的小短文，所以信中应该做到：

(1) A brief introduction about yourself
(1) 简短的自我介绍

(2) Give the hirer enough confidence to read further
(2) 让招聘官有兴趣读下去

(3) Provide a call to action as to what you’d want to be done further – fixing an interview etc
(3) 留下联系电话便于日后进一步联系——确定面试日期等等

Secondly, it is very important to tailor-make your cover letter as per the job. This means you will have to do some research on the company, address the letter to the concerned person (most preferably include their name) . This research can be easily and quickly done on the web.
第二，对每一份工作应该量身打造求职信。这意味着你需要了解下公司背景，把信寄给相关人员（最好能写上他们的名字）。公司相关资料在网上可以很方便找到。

Thirdly, it is imperative as well as logical to establish your expertise in the cover letter. Talk about your skills and show why & how you can be a good fit for the job. You can also mention how enthusiastic about the job position and how can fit the corporate culture perfectly.
第三，在求职信中体现你的专业技能是很合理而且相当有必要的。谈谈你的技能并说出它们为什么以及如何与目标职位相关。你也可以提一下对职位的热忱以及如何很好融入公司文化。

Last but not the least it is absolutely necessary never to write the same letter to another company. This can prove to be a greater waste of time on your part than the employers. In fact, writing a cover letter after doing your research and customizing it to fit the specific company can be the spark that gets the fire going. It is always a better idea to write bespoke cover letters to a select few companies (and wait for their response) than to write cover letters “in bulk” as they will hardly evoke a response.
最后很重要的一点，不要给不同公司写相同内容的求职信。你浪费的时间将比那些看求职信的雇主更多。事实上，了解公司情况后再有针对性的写求职信可以让你更有机会。选定几家公司，根据不同情况写求职信，然后等待回复比“批量生产”好很多，因为后者几乎石沉大海。