He tacked up a picture on the blackboard .

他把一张图片钉在了黑板上。

They tacked two new clauses to the contract .

他们在那份合约上附加了两条新条款。

A final paragraph had been tacked on at the end of the report .

报告的最后又加了一段。

We tacked some posters on the wall .

我们把一些海报钉在墙上。

He tacked the notice on the bulletin board .

他把通知钉在了布告板上。