facility,device,tool,equipment的区别是什么?

如：
a completer of equipment
an important piece of equipment
basic kitchen equipment
stereo equipment
facility 是可数名词,常用复数形式.facilities指为一特殊活动或目的所提供的种种便利,包括设备、建筑物和服务等等.如：
production facilities
facilities for study
facilities for travel
sports facilitiesdevice装置,设计,策略,设备
这个既可以是抽象的,也可以是具体的比如:
1.They use television advertising as a device for stimulating demand.
他们利用电视广告作为刺激需求的方法.
2.Her illness is merely a device to avoid seeing him.
她所谓生病只不过是避免见他的花招而已.
3.The device had undergone extensive testing.
这种装置经受过广泛的试验.
tool工具例句与用法:
1.Words are the tools of his trade.
言语是他那一行必不可少的工具.
2.The artist tooled a pattern onto the cover of the book with a hot needle.
那位艺术家用烧热的针在书的封面上烫出图案.
3.This program gives managers a valuable planning tool.
这套程序是经理人员制订计划的可贵的工具.