同意蒋老师的解答。不过，加and 也正确，以表示并列关系。如下所示：

1. No matter how low you consider yourself, there is always someone looking up to you wishing they were that high.

2. No matter how low you consider yourself, there is always someone looking up to you and wishing they were that high.

两句的区别：

句1，looking up to you 作定语修饰someone，而wishing they were that high 作状语，伴随looking up to 这个动作，这两个分词短语有主次之分，looking up to是主信息，wishing是次信息，具有描述性。意味着“在敬仰你的同时，还期盼自己能达到你那样的高度”。

句2，looking up to you 和wishing they were that high 是两个并列成分，同时作定语修饰someone，这两个分词短语没有主次之分，在意义上平分秋色。意思是：“总是有这样一个既敬仰你、又期盼自己能达到你那样高度的人”。

再举两个类似的例子，请仔细体味（这两句都正确无误）：

1.Wang Peng sat in his empty restaurant feeling very frustrated.

2.Wang Peng sat in his empty restaurant and felt very frustrated.

王鹏坐在空荡荡的餐馆里，感到十分沮丧。

句1，feeling very frustrated 作伴随状语，带有描述性，给人以生动之感。

句2，felt very frustrated 作并列谓语，属于平铺直叙，缺乏生动感。

从表达生动与否上看，第1句明显优于第2句。