by the sly

副词 adv.
中文释义

英文释义

副词 adv.
  1. on the sly dated,not-comparable
    — I read Plutarch, and Shakespeare, and Don Quixote by the sly, and supplied myself in that way with wandering thoughts, while my tutor was assuring me that "an improved man, as distinguished from an ignorant one, was a man who knew the reason why water ran downhill."
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