落日有落日的妙处，古代诗人在这方面留下不少优美的诗句，如像“大漠孤烟直，长河落日圆”、“落日照大旗，马鸣风萧萧”，可是再好，总不免有萧瑟之感。
B-Thing I-Thing O B-Thing I-Thing O O O O B-Time I-Time B-Person I-Person O O O O O O B-Metric I-Metric O O O B-Thing I-Thing O O O O B-Location I-Location B-Thing I-Thing O O B-Thing I-Thing I-Thing I-Thing O O O O B-Thing I-Thing O B-Thing I-Thing O B-Thing O B-Thing O O O O O O O O O O O O O O O O O O