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。

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.

youdao

模型驱动表现具有一个域不变模式：它足够普通，可表示任何持久化类型。

A model-driven representation has a domain-invariant schema: it is generic enough to express any persistent type.

youdao

模型驱动表现具有一个域不变模式：它足够普通，可表示任何持久化类型。

A model-driven representation has a domain-invariant schema: it is generic enough to express any persistent type.

youdao