sand：沙
例句：Sift gold from sand. 沙里掏金。
pail：桶
例句：He kicked over the pail through carelessness. 他不小心把桶踢翻了。
shovel：鐵鏟
例句：He jammed his shovel into the sandy soil. 他使勁把鏟子插進(jìn)沙土。
shell：動物的殼
例句：The snail retreated into its shell. 蝸?？s進(jìn)殼里去了。
sand castle：沙堡