3. 单复数特殊名词：
man/men woman/women tooth/teeth foot/feet goose/geese
basis/bases analysis/analyses crisis/crises hypothesis/hypotheses
axis/axes alga/algae larva/larvae fungus/fungi stimulus/stimuli
datum/data bacterium/bacteria medium/media spectrum/spectra
mouse/mice child/children phenomenon/phenomena
4.单复数同行 ：
aircraft spacecraft series species means sheep deer fish
salmon trout carp starfish jellyfish shellfish walrus
5. 可跟that同位从句：
observation, fact, belief, discovery, doubt, statement, conclusion, decision idea,
evidence, hope, news, opinion, thought, rumor, explanation, truth
来源：太傻论坛 作者：inter-ren
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