名詞 tack:

1. the heading or position of a vessel relative to the trim of its sails
2. a short nail with a sharp point and a large head
3. gear for a horse
   同義詞：stable gear, saddlery
4. (nautical) a line (rope or chain) that regulates the angle at which a sail is set in relation to the wind
   同義詞：sheet, mainsheet, weather sheet, shroud
5. (nautical) the act of changing tack
   同義詞：tacking
6. sailing a zigzag course

動詞 tack:

1. fasten with tacks
2. turn into the wind
   同義詞：wear round
3. create by putting components or members together
   同義詞：assemble, piece, put together, set up, tack together
4. sew together loosely, with large stitches
   同義詞：baste
5. fix to; attach
   同義詞：append, tag on, tack on, hang on
6. reverse (a direction, attitude, or course of action)
   同義詞：interchange, switch, alternate, flip, flip-flop

1. The speaker suddenly changed tack and left us all rather confused.
   演講人突然改變了論調，把我們都搞糊涂了。
2. I hammered a tack into the wall and hung a small picture from it.
   我在墻上釘了一個圖釘，然后在上面掛了一張小圖片。
3. My mother tacked the sleeves on before sewing them.
   我媽媽在把袖子縫好之前，先用大針腳把它縫好。