"Hiss, it's so sour." I don't understand why some people like such sour plums and don't eat them when they are ripe, but prefer to eat them raw.
"Hiss, it's so sour." It was clear that what he was eating were raw plums, but there were still people rushing to eat them, which was inexplicable.
Intention: People cannot have youth and the feeling of youth at the same time. I am holding my youth and writing youth here.