孩子们用捡来的蛤蜊壳做手工。

The kids made crafts with the ___clamshells they found.

这款翻盖手机的贝壳式设计让它能轻松放入口袋。

The ___clamshell design of this flip phone allows it to fit easily in your pocket.

工人们用蛤壳式挖掘机清理河底的淤泥。

The workers used a ___clamshell to clean the mud from the riverbed.