embryologist的复数形式为：embryologists...

case study的复数形式为：case studies...

sitting room的复数形式为：sitting rooms...

absurdity的复数形式为：absurdities...

enema的复数形式为：enemas...

periscope的复数形式为：periscopes...

streamline的复数形式为：streamlines...

chairman的复数形式为：chairmen...

dullard的复数形式为：dullards...

archenemy的复数形式为：archenemies...

vicar的复数形式为：vicars...

gurnard的复数形式为：gurnard...

eraser的复数形式为：erasers...

matchmaker的复数形式为：matchmakers...

altercation的复数形式为：altercations...

withdrawal的复数形式为：withdrawals...

reincarnation的复数形式为：reincarnations...

congratulation的复数形式为：congratulations...

aristocracy的复数形式为：aristocracies...

anthrax的复数形式为：anthraces...

dynasty的复数形式为：dynasties...

mayor的复数形式为：mayors...

adult的复数形式为：adults...

lattice的复数形式为：lattices...

kingfish的复数形式为：kingfish...

dauphin的复数形式为：dauphins...

environment的复数形式为：environments...

fifty的复数形式为：fifties...

report card的复数形式为：report cards...

comp的复数形式为：comps...