I press the thumbtack into the board with thumb.

用大拇指将图钉按在木板上。

He thumbtacked the picture to the wall.

他用图钉将画钉在墙上。

Have succeeded on having no way with one xylon chopsticks again , a thumbtack being fixed again to chopsticks!

注意不要将图钉按的太紧，让子之间有一点点空隙，方便让它转动。