韦氏词典给出单词解释的格式看不懂,注意我说的是格式!例如subject的解释如下：1:onethatisplacedunderauthorityorcontrol:asa:VASSALb(1):onesubjecttoamonarchandgovernedbythemonarch'slaw(2):onewholive

　　韦氏词典给出单词解释的格式看不懂,注意我说的是格式!

　　例如subject的解释如下：

　　1:onethatisplacedunderauthorityorcontrol:asa:VASSALb(1):onesubjecttoamonarchandgovernedbythemonarch'slaw(2):onewholivesintheterritoryof,enjoystheprotectionof,andowesallegiancetoasovereignpowerorstate

　　2a:thatofwhichaquality,attribute,orrelationmaybeaffirmedorinwhichitmayinhereb:SUBSTRATUM;especially:materialoressentialsubstancec:themind,ego,oragentofwhateversortthatsustainsorassumestheformofthoughtorconsciousness

　　3a:adepartmentofknowledgeorlearningb:MOTIVE,CAUSEc(1):onethatisactedon*thehelplesssubjectoftheircruelty*(2):anindividualwhosereactionsorresponsesarestudied(3):adeadbodyforanatomicalstudyanddissectiond(1):somethingconcerningwhichsomethingissaidordone*thesubjectoftheessay*(2):somethingrepresentedorindicatedinaworkofarte(1):thetermofalogicalpropositionthatdenotestheentityofwhichsomethingisaffirmedordenied;also:theentitydenoted(2):awordorwordgroupdenotingthatofwhichsomethingispredicatedf:theprincipalmelodicphraseonwhichamusicalcompositionormovementisbased

　　其中的123和括号123以及星号,冒号还有abc这样的字母.一层一层的关系看不明白,是什么逻辑关系呀?

　　背单词的时候背到哪一层就可以了呢？