夏日一天,我和小伙伴来到河边放纸船。我们把一艘艘纸船放入河中,可它们全都在水中晃悠一两下便沉了下去。这个结果让我们很扫兴,便各自回家了。到家后,我还一直在想:纸船为什么会沉呢?是纸会吸水的缘故吗?如果用不怕水的材料,是不是就不会沉了?塑料不就不怕水……想到这里,我立刻来了精神,决定要做一艘不沉的纸船。于是,我翻出 Summer day, I and my partner came to the river to put paper boats. We put a paper boat into the river, but they all sank in the water for a second or two and then sank. This result disappointed us and went home separately. After I got home, I still wondered: Why did the paper ship sink? Is the paper water-absorbent? If it is not afraid of water, will it not sink? The plastic is not afraid of water ... Immediately came the spirit, decided to do a not heavy paper boat. So, I pulls out