artificial bed造句

In fishery management, a spawning bed is an artificial bed constructed by wildlife professionals in order to improve the ability of desired game fish to reproduce.
On the occasion of the April 22, 2007, the Earth Day, the city government announced its plans for the Banjica forest in 2007, which will include the construction of the trim trail, artificial bed for the forest's stream and placing of bird houses through the forest.
It's difficult to find artificial bed in a sentence. 用artificial bed造句挺难的