螺

例句：

1. 1. The snail is slowly moving its shell across the sand.
   蜗牛正在慢慢地在沙子上移动它的壳。
2. 2. The snail has a shell that protects it from predators.
   蜗牛有一个壳来保护自己免受捕食者的伤害。
3. 3. Snails are fascinating creatures with unique adaptations for their environment.
   蜗牛是令人着迷的生物，它们具有适应自己环境的独特的适应性。