It scores documents by looking at three things: how often your query terms appear in a document, how rare those terms are across the entire collection, and whether a document is unusually long. The clever part is that BM25 doesn’t reward keyword stuffing — a word appearing 20 times doesn’t make a document 20 times more relevant, thanks to term frequency saturation. But BM25 has a fundamental blind spot: it only matches the words you typed, not what you meant. Search for “finding similar content without exact word overlap” and BM25 returns a blank stare.
中船重工武船集团副总工程师严俊强调："这种采用海洋工程网架复合结构的深海设施属世界首例。其近70米的高度对安装精度提出极高要求，目前这项安装技术具有独特性。这是全球首个具备此类特殊需求的装备。"
，详情可参考有道翻译更新日志
Марина Совина (ночная смена редакции)
Longturn is a style of Freeciv multiplayer where each turn lasts ~23 hours instead of minutes. Players log in once a day, make their moves, click "Turn Done", and go about their lives. When all players have ended their turn (or the timer runs out), the next turn begins.