Steel's fragility at low temperatures first became a major concern during the Second World War.

第二次世界大战期间，材在低温下的易碎性首次成为人们关注的。

Brittleness remains a problem when building steel structures in cold conditions, such as oil rigs in the Arctic.

在寒冷条件下材结构，比如北极地区的石油钻塔，的易碎性仍然是一个问题。

But there's a kind of brittle fragility that comes along with seriousness as well.

但过于认真也会带来一种脆弱的易碎性。

However, RCT permanently deprives vitality and sensitivity from thetooth, consequently increasing the friability of the remaining tooth.

然而, RCT永久性地剥夺了牙齿的活力和敏感性, 从而增加了剩余牙齿的易碎性。