一颗种子如何长成大树?不如你来试一试。你需要:两颗青豆,一只干净的塑料杯,一张纸巾,水。第一步:把纸巾折叠两次。第二步:把纸巾浸湿,放在干净的塑料杯里。第三步:把青豆种子放在纸巾和杯子中间。第四步:把杯子放在有阳光的地方,晾晒几天。第五步:观察种子。每三天做一次记录。两周以后,发生了什么?注意:保持纸巾是湿的,记住要每天加水!树就是这样开始生长的!观察种子的成长过程,画下种子生长过程中不同阶段的图片。 How to grow a seed into a big tree? Better to give it a try. You need: two green beans, a clean plastic cup, a tissue, water. The first step: fold the tissue twice. Step two: Soak the tissue and put it in a clean plastic cup. The third step: the green beans on the paper towel and cup in the middle. The fourth step: the cup on a sunny place, drying a few days. Step five: observe the seeds. Record once every three days. What happens after two weeks? Note: Keep the tissue wet and remember to add water every day! The tree begins to grow! Observe the growth of the seed and draw pictures of the different stages of the seed’s growth.