n.河床;河槽;
例句:
The workers rammed piles into a riverbed.
工人们把木桩打入河床内.
They loaded sand and gravel from the riverbed into a washing pan.
他们满载砂石从河床成为洗衣机潘.
A deposit of gold ore in an old riverbed.
富金砂矿古河床里的金砂矿床.