我用别针把两张纸固定在一起。

I used two ___pins to hold the papers together.

这些耳环需要细小的金属针来固定。

These earrings need small metal ___pins to secure them.

保龄球比赛中，你需要用球击倒所有十个球瓶。

In bowling, you need to knock down all ten ___pins with the ball.

走了这么远的路，我的腿都酸了。

After walking so far, my ___legs are really sore.