The glass jar had a metal rod sticking out of it.

玻璃瓶中伸出一根金属棒。

If you're a window gazer like most flying fans  are, you might have noticed some little metal rods sticking out of the back of the wings  of the plane.

如果您像大多数飞行爱好者一样是个窗外的爱好者，您可能已经注意到飞机机翼后部伸出一些小金属棒。