First and foremost, I think you should work harder on your biology.
首先，我认为你应该多在生物学上下功夫。
He does a bit of writing, but first and foremost he's a teacher.
他也写一些文章, 但他主要是个教师.
Do you know who is the foremost writer in the English language?
你知道谁是最重要的英语作家吗？
