[詞典] pour water off a steep roof -- sweep down irresistibly from a commanding height; operate from a strategically advantageous position; be strategically situated;
[例句]Yehuda還寫了篇過去壹年的回顧，高屋建瓴地（相比較發布說明而言）對變化進行了總結和概括。
Yehuda also wrote a retrospective over the last year, giving a high-level summary ( compared to the release notes) of the changes.