请英文好的朋友帮助检查一下以下英语写作有没有错误,谢谢

问题描述:

请英文好的朋友帮助检查一下以下英语写作有没有错误,谢谢
These three studies make significant contributions to an important fact of leaders in large companies which is group-wide company or Multinational Corporation. They all make useful proposals to address the issue of what does it take to be a successful business leader and manager in the 21st century. It is recommended that further studies are important source of competitive advantage for companies.

第一句话:
1.these three studies改成the three studies就好了
2.make significant contributions to后面的内容不是很清晰.为什么做出了巨大贡献.仅仅说了an important fact是发现了一个fact呢,还是其他?不得而知.
3.leader我想这里你想要表达的是leadership,领导能力的意思.
4.companies后面不应该用定语从句,其实几个名词,用作同位语就好了
修改后是这样的:These three studies make significant contributions to the findings of an important factor of leadership large companies,especially group companies or multinational ones..
第二句:
1.make useful proposals读起来怪怪的.好像没有useful proposal这个表达法,useful suggestions更好.
修改之后是这样的:They all make useful suggestions in addressing such issues as what makes a successful business leader or manager in the 21st century.
第三句:
1.compeitive advantage我才你是想表达竞争优势.其实competitiveness一个单词就够了.
2.recommend在这里好像不太合适.不是单词不对,而是你好像没推荐什么.
修改之后是这样:It is suggested that further studies are important source of competitiveness for companies.