usual: stresses the absence of strangeness or unexpectedness and is applicable to whatever is normal: my ~ order for lunch.    normal正常和usual通常互相解释，日常使用没有区别。


customary: applies to what accords with the practices, conventions, or usages of an individual or community: a ~ waiting period before remarrying.   （practice实践、惯例  convention常规 usage和custom互相解释，都表示习俗）


habitual: suggests a practice settled or established by much repetition: a ~ excercise regime that served her well.   请注意重音在第二个音节  regime锻炼方法


wonted: stresses habituation but usually applies to what is favored, sought, or purposefully cultivated: his ~ pleasures had lost their appeal.


accustomed: is less emphatic than wonted or habitual in suggesting fixed habit or invariable custom: accepted the compliment with her ~ modesty.


usual通常的: 强调不奇怪不出意料，也表示正常的，customary习俗的: 符合惯例常规习俗，habitual习惯的: 通过大量重复固定下来的，wonted习惯的: 通过爱好或培养形成的习惯，accustomed习惯的: 同样表示习惯，语气稍弱


记忆方法: 1) 首字母UCHWA排序为WACHU挖出<==惯常     应习惯性的挖掘出机会和潜力

        2) 惯常的意思是因重复而熟悉mean familiar through frequent or regular repetition.首字母UCHWA排序为WACHU挖出<==惯常