have sth at one’s finger

更新日期：2026-08-14

词语	have sth at one’s finger
释义	have sth at one’s finger-ends 熟悉某事物;精通某事物;对某事物了如指掌：Many of our geological engineers have prospecting and mining technique at their finger-ends.我们的许多地质工程师对于探矿、采矿技术了如指掌。
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