李先生对研究工作有很突出的能力并且人格十分优秀。

Mr. Li has a very marked ability for research work and an attractive personality.

youdao

因此，对钻井泵的研究是十分有必要的。

Therefore, the study of drilling pump is very necessary.

youdao

因此，研究HIRF对飞机安全的影响就变得十分有必要。

Therefore, it is necessary to research the effect of HIRF to aircraft safety.

youdao

因此，研究HIRF对飞机安全的影响就变得十分有必要。

Therefore, it is necessary to research the effect of HIRF to aircraft safety.

youdao