The empty shell of a snail or clam may be left behind, and if it is sufficiently durable and resistant to dissolution, it may remain basically unchanged for a long period of time.

蜗牛或蛤蜊的空壳可能会被留下来，如果足够持久和抗溶解，它可能会在很长一段时间内基本保持不变。

youdao

"A snail on the wall taught me how to do it," said Tom.

“墙上的一只蜗牛教会了我怎么做。”汤姆说。

youdao

My boy, I am a snail and snails are never in a hurry.

我的孩子，我是一只蜗牛，蜗牛从不着急。

youdao

During the demonstration, the player egged Milo on to squash a snail in the garden.

BBC: 'Virtual human' Milo comes out to play at TED in Oxford

Current connections are a snail-like 9, 600 bytes per second compared with the standard 28, 800 bps.

CNN: On-line in Yunnan

The crowds are so dense that vehicles crawl at a snail's pace amid the tight human mass.

CNN: Arafat: The climax of Hajj