available例句
        They have only a vague idea of the amount of water 
available.
他们只是大概知道可用水的总量。
Other amenities, less commonly 
available, include a library and exercise room.
还有一些不太常有的设施,包括图书馆和健身房。
Cheap goods are 
available, but not in sufficient quantities to satisfy demand.
有一些廉价的商品,但是数量不足以满足需求。