查询词典 wear a beard

In the absence of such a high degree of cleanliness, adsorbed gases, water vapor, oxides, and contaminants reduce friction and the tendency to seize but usually result in severe wear; this is called "unlubricated" or dry sliding.

由于无法实现如此高的清洁度，摩擦面中的气体，水蒸汽，氧化物及其他污染物会在此过程中减少摩擦力及咬合的趋势，但也往往导致更严重的磨损；这种情况被称为&无润滑&或干摩擦。

Contact configuration under unlubricated condition were investigated, with the effect of the nano-La_2O_3 content on the friction and wear behaviors of the composite coatings to be emphasized. The worn surfaces of the composite coatings were analyzed using a scanning electron microscope and compared with t...

结果表明，在干摩擦条件下，随着La2O3纳米颗粒含量的增加，纳米复合镀层的摩擦系数降低，耐磨性能提高；La2O3质量分数为3.1%的纳米复合镀层的摩擦系数最低，耐磨性能最佳；纯Ni镀层呈现严重的粘着磨损特征，而纳米复合镀层主要呈现轻微磨粒磨损特征。

Its subject coverage includes: composites from a wide range of matrix alloys, particulate sizes, and loadings; and wear processes also over a full range, including sliding, abrasion, erosion, and impact, etc., in both lubricated and unlubricated conditions.

它的主题涉及的范围包括：各类基合金合成物、颗粒大小与装入；全面的磨损过程，包括在润滑与无润滑条件下的滑动、磨擦、侵蚀与冲击。

The microstructure, phases composition and microhardness of the coating were analyzed and measured by SEM, XRD and microhardness testers respectively, and the friction and wear properties of the specimens sliding against Al2O3 ceramic in a ball-on-discmode and under unlubricated condition were investigated.

中文摘要：采用粉末包埋法在P110钢表面制备渗铬层；借助扫描电子显微镜、X射线衍射仪和显微硬度计，对渗铬层的显微组织、相组成和显微硬度进行了分析和表征，并通过无润滑条件下的球－盘式摩擦磨损试验研究了渗铬处理对其摩擦磨损性能的影响。

At lower normal loads, the composites exhibit wear resistance superior to that of SiCw/6061Al composite under unlubricated sliding friction conditions.

对低Al含量的复合材料，由于Al〓O〓颗粒的存在强化了Al〓Ti相的晶界，增加了Al〓Ti解理裂纹扩展阻力，同时位错强化和细晶强化也对强度有一定贡献；对以Al为主要相的复合材料，兼有位错强化、固溶强化、细晶强化和弥散强化多种机制。

Wear mechanism for couple consisting of Si 3N 4 ceramic and chilled cast iron under unlubricated condition were studied throug h block-pin test.

研究了无润滑条件下 Si3N4陶瓷-白口铸铁磨擦副的磨损机理。

It is a tradition for Chinese to wear red clothes. In Chinese culture, red brings wealth, health and happiness. Also, red can protect people from unluck. There is a story about red.

中国人穿红色的衣服已成为一种传统，在中国文化里，红色被认为会带来财富、健康和幸福，红色也能阻止坏运气的到来。

Often this phenomenon is undesirable, since it causes excessive control action leading to increase wear of the actuators and to excitation of unmodeled dynamics.

通常这个现象是令人不快的，它会引起额外的控制作用从而导致激励者穿戴的增加和未建模动力学的刺激。

Insane Sims respond to events in life unpredictably. They say what they want, do what they want and even wear what they want. Even if it doesn't make sense to anyone else.

疯狂的市民对生活中事物的反应是无法预测的，他们说任何想说的话，做任何想做的事，甚至穿任何他们想穿的，即使这在旁人眼中毫无道理可言

I take my oath :Don't live up to my parents' hopes ; Don't fall short of my teacher's expectations ; Don't be ungrateful to wisdom granted by God ; Don't disappoint my dream of the youth I promise :I won't shrink back weakly ;I won't hesitate unprofitably ; I will wear an unhurried smile to win the resplendence that belongs to me .

我发誓：不负父母的期盼；不负恩师的厚望，不负天赐的智慧；不负青春的理想；我承诺：不作懦弱的退缩；不作无益的彷徨；我将带着从容的微笑去赢得我志在必得的辉煌。

Finally, the Knight strung a line between two of the monoliths and tied the horses up there.

最后，骑士们在两颗巨石之间拉了一条绳子，将他们的座骑绑在上面。

T7zN/hyS0 The island lies south by east from here.

那个岛位于此地的正南偏东方向。