1·The truck snailed up the hill.
卡车蜗牛一般爬上小山。
2·The train snailed up the steep grade.
火车蜗牛一般地慢慢爬上陡坡。 。
3·The train snailed up the steep grade.
火车蜗牛一般地慢慢爬上陡坡。