n.图钉;
例句:
He pinned up the notice with a thumbtack.
他用图钉将通知挂起来.
He affixed the postcard to the wall a thumbtack and then and continued translating Richthofen's China.
他用图钉把这张明信片钉在墙上,然后继续翻译李希霍芬的《中国》.
I worry that Microsoft is introducing Thumbtack at a bad time.
我担心,微软推出了图钉在一个坏的时间.