白垩

To rub or cover with chalk, as the tip of a billiard cue.

擦抹粉块以白垩擦或覆盖，如弹子棒梢

A small cube of chalk used in rubbing the tip of a billiard or pool cue to increase its friction with the cue ball.

擦抹于球杆顶端的粉块用来擦弹子球棒梢或落袋台球棒梢以增加其与球的摩擦的一小方块白垩

Games A small cube of chalk used in rubbing the tip of a billiard or pool cue to increase its friction with the cue ball.

擦抹于球杆顶端的粉块：用来擦弹子球棒梢或落袋台球棒梢以增加其与球的摩擦的一小方块白垩

Based on the study of biostratigraphy and anoxic eventstratigraphy, we propose that the Qingshankou Formation may correspond to the oceanic anoxic event at the CenomanianTuronian boundary in the Cretaceous, and the age of the Qingshankou Formation in the Songliao Basin is the Late Cenomanian to the Early Turonian.

结合生物地层研究成果，认为青山口阶下部曾发生过古湖泊缺氧事件，其层位大体可与白垩纪古海洋CenomanianTuronian界线事件层进行对比，由此提出了松辽盆地青山口阶下部的时代归属于晚白垩世Cenomanian晚期-Turonian早期的新观点。

It is very clear that their different opinions are mainly caused by their different understanding of the nature, components and international correlation of the Jehol Biota, as well as the criteria of the Jurassic-Cretaceous boundary.

非常明显，产生不同观点的主要原因是我国专家对于热河生物群的性质、特征、组成和国际对比，以及侏罗－白垩系界线的定义和标准各自有着不同的认识和理解。

Old English cealc, related to Dutch kalk and German Kalk, from Latin calx see calx

"麦斯"、和"粉笔"。氢氯甲基安非他命是无色透明的块状晶体，。。。2。白垩，粉笔

It indicates a regional tectonicprocess. The boundary extinction is mainly influenced by sea level changes in southernTibet. The regression occurred from late Campanian of Cretaceous to early Danian ofPaleogene.

西藏南部晚白垩世的海平面从坎潘晚期到丹尼早期是逐渐降低的，生物消亡特点显示出与海平面变化的一致性，可能原因主要受海平面变化的影响。

Three fish species of particular interest to the fishmeal and fish oil are Capelin, Spring Spawning Herring and Blue Whiting.

特别的好处的三个鱼种类对鱼粉和鱼油的是毛鳞鱼，产生鲱鱼和蓝色白垩粉的春天。

To create paintings on the coarse surface of the rocks, the artists first applied grass and clay on the roofs and walls of the cave s and then began painting.

为了在粗糙的岩壁上作画，历代的艺术大师们先在洞壁的四周及顶部抹上草泥，白垩打底，再绘制壁画。

Then the cementation and the relationship between cementation and suction are also studied.

最后对非饱和白垩的胶结特性及胶结作用与吸力的关系进行了研究。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。