
"he didn't have the guts to try it"
"sandpaper the wooden surface"
误 Sand are insoluble in water.
正 Sand is insoluble in water.
析sand表示“沙”或“沙地”时为物质名词,不可数。
我看见孩子们在沙滩上造城堡。误 I saw children building castles on the sand.
正 I saw children building castles on the sands.
析sand表示大片的“沙地”或“沙滩”时,常用其复数形式sands。