The open up before grandmother door a dark green vegetable plot, grandmother often gives vegetable plot loosen the soil, of vegetable and outer mother-in-law attend it is better to fall to grow more.
外婆家门前开辟了一块碧绿的菜地，外婆常给菜地松土，蔬菜在外婆的照料下越长越好。
Weekend, grandmother of my for company a loosen the soil, discovered a plump earthworm, “ , an earthworm! ” I say to grandmother. “ this is very normal, this soil is wet and rich, the earthworm can like to wait for be inside. ” grandmother says to continue at the same time at the same time loosen the soil. I also had heard of before, the earthworm likes to need the soil in moisture in, can is this true after all? Ear listens for empty, the eye sees for solid. I decide close automatic hand experiments.
一个周末，我陪着外婆一起松土，发现了一条胖乎乎的蚯蚓，“哇，一条蚯蚓！”我对外婆说。“这很正常，这土壤湿润肥沃，蚯蚓可喜欢待在里面了。”外婆一边说一边继续松土。我以前也听说过，蚯蚓喜欢待在潮湿的泥土里，可这到底是不是真的呢？耳听为虚，眼见为实。我决定亲自动手试验一下。
I prepared an empty shoe case first, in the clay that shoe box either side differs on the shop respectively, it is damp clay at the same time, it is dry clay at the same time, a passageway left among two kinds of clay. My not needing the slightest effort found 5 earthworms from clay of grandmother home vegetable plot, ready, the experiment begins.
我先准备了一个空的鞋盒，在鞋盒两旁分别铺上不同的泥土，一边是潮湿的泥土，一边则是干燥的泥土，两种泥土中间留了一条通道。我不费吹灰之力就从外婆家菜地泥土里找到了5条蚯蚓，一切就绪，实验开始。
Above all, I put 5 earthworms on the passageway among two kinds of clay entirely, close the lid of shoe box, await patiently. After 15 minutes, I open lid, discovery has an earthworm to write a composition to go up in the passageway, 3 are in damp clay, 1 is in dry clay. I build upper cover again child, begin a test the 2nd times. After 15 minutes, open lid, this I discover to there has been an earthworm on the passageway, 5 earthworms are entirely in damp clay. The 3rd experiment and quadratic result are same. Pass a test 3 times this, final, the conclusion that I reach is: The earthworm likes to need the soil in moisture really in.
首先，我把5条蚯蚓全部放在两种泥土中间的通道上，关上鞋盒的盖子，耐心等待。15分钟后，我把盖子打开，发现有1条蚯蚓作文在通道上，3条在潮湿的泥土中，1条在干燥的泥土中。我再次盖上盖子，开始第二次实验。15分钟后，打开盖子，这次我发现通道上已经没有蚯蚓了，5条蚯蚓全部在潮湿的泥土里。第三次实验和第二次的结果一样。通过这三次实验，最终，我得出的结论是：蚯蚓确实喜欢待在潮湿的泥土里。
Can is this why? Through consulting data I figured out reason. Original, because the earthworm does not have technical respirator officer, the breath of the earthworm should rely on to be able to secrete the mucus, body wall that keeps wet from beginning to end to finish. Accordingly, the earthworm just needs to live in damp clay, with keeping parietal wet.
可这是为什么呢？通过查阅资料我弄明白了原因。原来，因为蚯蚓没有专门的呼吸器官，蚯蚓的呼吸要靠能分泌黏液、始终保持湿润的体壁来完成。因此，蚯蚓才需要生活在潮湿的泥土中，以保持体壁的湿润。
Although the earthworm likes to wait for the clay go-between person in moisture to all know, but before me never deep administrative levels has thought why. Pass this choice test of the earthworm, let me know the propensity of the earthworm not only, more make me clear, everything should take evidence to talk, know its to should know its the reason why more like that, it is difficult to should dare to break through each, go going after scientific mystery!
虽然蚯蚓喜欢待在潮湿的泥土中人人皆知，但我以前从没深层次想过为什么。通过这次蚯蚓的选择实验，不仅让我知道了蚯蚓的习性，更让我明白，凡事要拿证据说话，知其然更要知其所以然，要敢于突破一个个困难，去追求科学的奥秘！(文/庄锦卉)