plentiful: implies a great or rich supply, often of something that is not regularly or universally available: peaches are ~ this summer.


ample: implies a generous sufficiency to satisfy a particular requirement: an ~ amount of food to last this winter.       generous慷慨warmhearted readiness to give真诚热情地给予，如a friend's generous offer of assistance一位慷慨地提出帮助        又如ample opportunity/evidence/space/proof/time充分的机会/足够的证据/宽敞的空间/充分的证明/足够的时间


abundant: suggests an even greater or richer supply than does plentiful: has surprisingly ~ energy for a woman her age.   习语out of an abundance of caution出于高度谨慎


copious: stresses largeness of supply rather than fullness or richness: ~ examples of bureaucratic waste.   又如copious (= large) amounts of water大量的水，如I took copious notes我做了大量的笔记，如she supports her theory with copious evidence她以大量的论据来支持自己的理论


plentiful大量: 指大量丰富供应，比通常数量大，ample足够: 表示足够满足需求 ，abundant充足: 表示比plentiful更大量丰富地供应，copious大量: 只强调大量而不强调充足丰富


记忆方法: 1）首字母PAAC平安长安<==供给充足

              2）充足的意思是足够有余但不过度mean more than sufficient without being excessive.