天山－3－22一个小问题

Giuseppe Alessi, a world-class chef whose life has been a search for the genuine and the delicious in Florentine cooking, is an accomplished scholar not only unearthing many of his recipes from medieval and Renaissance manuscripts but also a poet and philosopher who draws his inspiration from the idyllic frescoes of Etruscan tombs.

1. not only unearthing many of his recipes from medieval and Renaissance manuscripts but also a poet and philosopher who draws

2. unearthing many of his recipes both from medieval and Renaissance manuscripts, as well as a poet and a philosopher who draws

3. who unearths many of his recipes from medieval and Renaissance manuscripts, as well as a poet and a philosopher who draws

4. who unearths many of his recipes from medieval and Renaissance manuscripts, but also a poet and a philosopher drawing

5. unearths many of his recipes from medieval and Renaissance manuscripts, a poet and philosopher drawing

请问c中的a poet and a philosopher 为什么不把a去掉？谢谢

记得毛主席曾经说过：

他是一个伟大的人、一个纯粹的人、一个有益于人民的人...

这里就用了很多不定冠词a

反观英文表达也是一样：

he is a great man, a true man, a man who benefits people...

去掉a是不可以的