tack [tæk]
名词[n.]: 1, 平头钉，大头钉; 2, 思路，行动方针; 动词[v.]: 1, 以大头针钉住; 2, 附加
例句1, She used a tack to pin the poster to the wall.
她用一个大头钉把海报钉在墙上。
例句2, The company decided to change its tack and focus on digital marketing.
公司决定改变策略，专注于数字营销。
例句3, He tacked the note to the bulletin board for everyone to see.
他把便条钉在公告板

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