如果不確定2年前暑期研究的教授是否對我有好印象（自己認為做得不怎麼樣）而不請他
寫推薦信的話會不好嗎？（目前有2封其他專題教授推薦信，1封書報討論推薦信）
這是我在http://ppt.cc/yeU1 看到的：
Can I send in more than 3 letters of recommendation?
Yes. Most students have to work to find 3 good letters, and those students
should certainly not send in extra. On the other hand, some students do
research in several groups and find they need more than 3 letters to give a
full picture of them and their activities. If you fail to send in a letter
from a research experience, the committee will probably assume that your
research experience went poorly.
所以對於可接受3封以上推薦信的學校，是不是不要提起那段暑期研究，還是試試看問
之前的暑期教授呢？（雖然即使她願意我覺得可能也不會是很強的推薦信）
謝謝。。。。