Noun:

1. a loose temporary sewing stitch to hold layers of fabric together

2. (nautical) the act of changing tack

tackn.大头钉；行动方针v.以大头针钉住；附加

bastingn.假缝；假缝的针脚；假缝用线动词baste的现在分词.

bastev.疏缝；痛斥；大骂；润以油脂；涂以奶油

1. His brother is sharp as a tack; he got100 on every test.
   他弟弟十分聪明伶俐，每次考试都得100分。
2. By tacking about, we were able to avoid the enemy guns.
   我们摆动着船帆不停地调转船头，才得以躲过敌人的炮弹。