Shells

Shells

动物的外壳

Look at this shell. A snail is inside this shell. Sometimes, part of the snail is outside the shell.

看看这个壳。一只蜗牛在这个壳里。 有时，蜗牛的一部分在壳外面。

The shell helps keep the snail safe. The shell moves with the snail.

壳有助于保护蜗牛的安全。 壳随着蜗牛移动。

Look at this crab. It has a shell. The crab lives inside the shell.

看这只螃蟹。 它有一个壳。 螃蟹住在壳里。

The shell helps keep the crab safe. The shell moves with the crab.

壳有助于保证螃蟹的安全。 壳随着螃蟹移动。

Look at this shell. A clam is inside this shell. The shell helps keep the clam safe.

看看这个壳。蛤在这个壳里。 壳有助于保护蛤蜊的安全。