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thumbtack
n
例子
The teacher used thumbtacks to hang student artwork along the classroom walls.
He carefully removed the old calendar from the wall, pulling out each thumbtack one by one.
Thumbtacks are useful for securing fabric to a corkboard for crafting projects.
She pinned the memo to the bulletin board using a yellow thumbtack.
She used thumbtacks to pin down the corners of the poster.
