N the 20th century, mankind has created material and spiritual wealth unmatched by any other time in history.

20世纪，人类创造的物质和精神财富，超过了以往任何一个时代。

youdao

If the failure is defined as the final fracture of a component, then both S-N curves and crack growth rate curves reflect the fundamental material behavior under fatigue loading.

如果都把一个构件的最终断裂作为疲劳破坏的定义，则S - N曲线和裂纹扩展率曲线均是反映金属在疲劳载荷作用下的基本材料特性。

youdao

She derived another formula relating the number of folds possible in one direction (n) to the minimum possible length of material (l) and the material's thickness (t)

她推导出了另一个关于折叠次数（n）、现实的最小长度（l）以及材料厚度（t）的关系式。

youdao

The agency said the material was mentioned in reports to the U.N.

CNN: Tons of Iraq explosives missing

Resolution 687 and that should have been reported under 1441, with Iraqi testimony that not only did they not tell the U.N. about this, they were instructed not to do it and they hid material.

CNN: Transcript: David Kay at Senate hearing

Obviously you know because we had Ambassador Rice last week discussing what this administration and countries in the U.N. believed were important tools for acting against North Korea moving missile parts or nuclear material or what have you as part of a proliferation regime.

WHITEHOUSE: Press Briefing