我在高中数学一直很差，所以我认为我以后大学会选文学专业。
I am always weak in math in high school, so I think I will choose to major in literature in college.
在大学，我被告知社会需求一直需要工程师，所以我努力地学那门专业。
In college, I was told that engineers would always be in demand so I worked hard in that major.
因为需要向从医人员进行专业的介绍，所以我们需要自己的销售力量。
We needed our own sales force because of the specialized way the product had to be represented to medical professionals.
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