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They will hardly know which facts to select from the great mass of evidence that steadily accumulates.
select from 从……中进行选择(同类中)
choose挑选（凭个人意愿）
一、有三种情况choose和 select不能互换：
1．当在两者中选一个时只能用choose, 即choose between
--We have to choose between leaving early and paying for taxi.
2．choose可带 wh从句
--I'll let you choose where we should go to eat.
choose to do 只能用choose.
-- What invariably happens is that a great number of things choose to go wrong at precisely the same moment.（L33 ）
--He has deliberately chosen to lead the life he leads and is fully aware of the consequences.
select比choose更正式， 即在许多同类的人或物当中根据客观标准对这两个加以比较，鉴别，认真地挑选出最好的、最喜欢的、最有用的。
perplex 难以理解（包含焦虑不安，不知如何解决的意思）
--He is perplexed for the answer.
bewilderment: n.
in bewilderment 茫然不知所措
bewildering a.令人眼花缭乱的
bewildered a.感到眼花缭乱的
deduce v. determine or decide sth. by given facts.推断，推理
--I deduce the conclusion from the given facts.
deduce …from 从…中推论，推断
infer 推断（不表示过程）
--What can you infer from the text?
