这把伞的伞骨里有一根金属加固条，让它在风中不会翻折。

There's a metal ___stiffener inside the umbrella ribs to prevent it from flipping in the wind.

这个书架需要一些加固条来防止弯曲。

This bookshelf needs some ___stiffeners to prevent it from bending.

在制作布丁时加入一些玉米淀粉作为增稠剂，可以让质地更浓稠。

Add some cornstarch as a ___stiffener when making pudding to give it a thicker texture.