钉住

pick up on───注意到；与…熟悉起来

take up on───接受

took up on───接受

catch up on───赶上；得到……消息；弥补

check up on───检查，核对，校对

taken up on───接受

takes up on───占上风

gang up on───联合对付；联合反对

gave up on───放弃；对…表示绝望；对…不再期待

When he found he could not secure my attention for the school course, he gave up the attempt as hopeless and went on a different tack.───当他发现他不能使我的注意力维持在学校的科目上时，就绝望地放弃了这种努力，而另辟蹊径。

the same tack, Li Ning in September signed up to sponsor Sudan's national track-and-field team.───同样的战略考量，李宁在9月份与苏丹国家田径队签约成为其赞助商。

Tack the sleeves on and then sew them up.───把袖子用粗针脚缝上，然后再细细缝好。