这座桥的稳固性经受住了强风的考验。

The ___strength of the bridge stood up to the strong winds.

这座古老的城堡在危险时期曾是国王的坚固堡垒。

The ancient castle served as the king's ___fastness in times of danger.

这种染料的色牢度很好，即使在阳光下暴晒也不会褪色。

The ___fastness of this dye is excellent, even when exposed to sunlight.