求翻译：在我小学二年级的时候，外公由于患癌症去世，从那时起，我就梦想长大成为一名优秀的医生。当我上高中的时候，一方面我对生物学科非常感兴趣，而且很擅长；而另一方面，我却对化学毫无兴趣，甚至讨厌，所以学的很吃力。是什么意思？

When I was in second grade, death of grandfather due to cancer, from then on, I dreamed of growing up to become a good doctor. When I was in high school, on the one hand I'm very interested in biology, and is good at, on the other hand, I had no interest to the chemical, even hate, so a great burden

In my second-grader when his grandfather, who died of cancer, and since then I grew up dreaming of becoming a good doctor. When I went to high school when the biological disciplines, on the one hand, I was very interested, but is also very good at, and on the other hand, I have no interest in chemis