tack
/tæk/📚 12096 43 2六级A tack or a thumbtack is a short pin with a wide head that you can push with your thumb, especially for a bulletin board. 图钉
noun [物质名词]大头钉，图钉；（为定样临时缝上的）粗缝针脚；马具，鞍辔；（航海）抢风调向，抢风航行路线，抢风航程；（系住帆角的）系帆索；（用系帆索）系住的帆角；行动方针，策略；廉价且难看的物品；黏着性，黏着力；（航海）（系住帆角的）系帆索
A tack is a short nail with a broad, flat head, especially one that is used for fastening carpets to the floor.
平头钉
verb [vt. 及物动词]（用平头钉）钉上，固定住；（为定样而）用粗缝针脚缝；戗风行驶，蜿蜒航行；（尤指画蛇添足地）增补，附加
If you tack pieces of material together, you sew them together with big, loose stitches in order to hold them firmly or check that they fit, before sewing them permanently.
用粗线脚缝
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