我爱的少年穿白衬衫很帅我爱的少女穿连衣裙很美
[wŏ ài de shăo nián chuān bái chèn shān hĕn shuài wŏ ài de shăo nǚ chuān lián yī qún hĕn mĕi]
It describes how the person thinks 'the boy I love looks very handsome in his white shirt and the girl I love looks pretty in her dress'. Here the person is expressing admiration for certain individuals and perhaps cherishing specific memories or images of those people.