Online Google Dictionary

ascertains 中文解釋 wordnet sense Collocation Usage Collins Definition
Verb
/ˌasərˈtān/,
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ascertaining, present participle; ascertains, 3rd person singular present; ascertained, past participle; ascertained, past tense;
  1. Find (something) out for certain; make sure of
    • - an attempt to ascertain the cause of the accident
    • - management should ascertain whether adequate funding can be provided