Lucy and Lily are sisters, but they look different. / Lucy and Lily are sisters, but they have different looks. / Lucy and Lily are sisters ,but they don't look the same./ Lucy and Lily are sisters,but they don't have the same look. 均为正确表达。
Lucy and Lily are sisters. But they look different.
第47个浪人|十八级Lucy and Lily are sisters, but they look different. / Lucy and Lily are sisters, but they have different looks. / Lucy and Lily are sisters ,but they don't look the same./ Lucy and Lily are sisters,but they don't have the same look. 均为正确表达。说的很好,这个句子比较简单。没什么争议。
Lucy and Lily are sisters,but they have different look.