短语词组短语nail someone down 敲定nail sth down 敲定某事使得万无一失nail -down 打钉法nail down to 翻译Wooden Nail Down 木条指甲挫clinch that nail down 把那个钉子钉牢He Nail Down Definite 他明确definitude nail down 明确nail down the agenda 安排当天的日程 返回 nail down