And his advocation of combining beauty with melancholy and sadness has become a poetic principle for the French symbolists as well.

• 首先，他提出的“为诗而诗”的“纯诗”理论发展成为象征主义的一个重要理论概念，而他所提倡的“哀伤”、“忧郁”的美学原则也成为象征主义诗人的创作法则。