The red quale of your visual experience of the tomato is what your experience represents the color of the tomato as being, and when the representation is veridical, the quale is the actual red color of the tomato. 

1. quale是哲学中的感受质。感受质，就是“红色性”，“疼痛性”，“热性”等主观现象。

2. 表语从句中what your experience represents the color of the tomato as being. 其中as being是什么意思？

3. 如果可能的话，希望能修正我的理解并尝试翻译：你视觉经验中番茄红色性，是你对番茄颜色的表征。如果这个表征是真实的，那么红色感受性就是番茄真正的红色。

4. 出自哲学文献：表征可用represent动词，representation，名词用。例如，一头真实的牛是被表征物，一副牛的画是表征。可以说，the cow is represtened by a picture in which there is a cow. The picture can be seen as the representation of the cow.