Circulating Avail流通效用
avail function效用函数
avail absorption助吸
avail analysis效用分析
avail model效用模型
avail evaluation效用评估
avail area有利区带
customer avail顾客效用
maximal avail最大效用
PHRASE（习语） If you do something to no avail or to little avail, what you do fails to achieve what you want. 徒劳 [书面]
His efforts were to no avail.
他的努力是徒劳的。
V-T（及物动词） If you avail yourself of an offer or an opportunity, you accept the offer or make use of the opportunity. 利用 [正式]
Guests should feel at liberty to avail themselves of your facilities.
客人们应可以随意使用你们的设施。