2, 填土英文？
为了保证树的成活，应该按照以下步骤来进行。第一，我们先挖一个深度大约为30厘米的坑，再把挖出的土回填到坑里，回填土高度为5到7厘米。 第二，把树苗种进坑里， 扶直立后再填土， 然后围树一圈用脚踩结实。 第三，再加上一层土。要注意的是，这个坑一定要低于地面，便于以后的养护。 第四，进行浇水，在浇水后再加一层薄土，起到保持水分的作用。In order to ensure the survival of the tree, should follow the following steps.First, we dig a pit of about 30 cm in depth and backfill the excavated soil into the pit. The backfill height is 5 to 7 cm. Second , the seedlings planted in the pit, help upright and then fil the soil, and then surrounded by trees with a strong foot step . Third, plus a layer of soil. It should be noted that this pit must be below the ground for future conservation. Fourth, watering, add a thin layer of soil after watering, play a role in keeping the water.
3, 填土英文？
One day, the teacher led the students to plant trees. On the road, the students ranked the neat team. the Weather is good, blue sky, white clouds floating on the spring really beautiful, ah. The teacher gave us hours of work, we all will dry up separately.The students first dig Shue Hang, digging exhausted the little seedlings into them, and then fill in the soil, the last to give the small saplings pouring a little water, a small tree on the kinds of better. We did elated. Xiaogang, and red done with special care. Red escorted small seedlings to small saplings Xiaogang fill up a good seed trees, and they are happy to laugh. After a tense morning of pleasant work, the students will have a small slope on the kinds of scores of tree saplings. Having watched the fruits of their labors, the students were extremely happy hearts, under the leadership of the teachers are satisfactory back home.译文：一天，老师带领同学们去植树。路上，同学们排着整齐的队伍。天气很好，蓝天上飘着朵朵白云，春天真美啊。老师给我们分了工，我们大家就分头干了起来。同学们先挖树坑，挖完后把小树苗放进去，再填上土，最后再给小树苗浇点水，一棵小树就种好了。大家干得兴高采烈。小刚和小红干得特别认真。小红扶着小树苗，小刚给小树苗填土，小树苗种好了，他们都高兴地笑了。经过一个上午紧张愉快的劳动，同学们在小土坡上种了几十棵小树苗。看着自己的劳动成果，同学们心里高兴极了，在老师的带领下，满意地回去了。
名词解释
pit
PIT精准致停最早用于赛车的危险动作，以追撞车辆的尾部保险杠迫使被撞车辆转向并失去控制，而被迫停车。
30
30（三十）是29与31之间的自然数、正整数，是一个偶数，也是一个有理数。30=2*3*5。
