粉笔

And, as anyone who has studied chemistry at school knows, if you drop chalk into acid it fizzes away to nothing.

并且，凡是学过化学的人都知道，把粉笔放到酸性溶液中，粉笔就会嘶嘶作响消失殆尽。

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

She laughed. She picked up my dictionary and talked to me."Look, Nancy. The second meaning of 'draw' is to make a picture with a pen, a pencil or chalk! So the sentence means: Make a picture of your house with a pen, a pencil or chalk."

我不知道。我不懂它的意思，我的朋友玛丽读了我刚写下的句子，她笑了，她拿起我的字典对我说"看Nancy draw的第二个解释是用钢笔简笔或粉笔画一张画，所以这句话的意思是：用钢笔简笔或粉笔画一张关于你家的画"我明白了！

Then the stick of chalk broke and I was left with a sump.

然后，那去粉笔断了，我只剩下了粉笔头儿。

A piece of chalk or chalklike substance in crayon form, used for marking on a blackboard or other surface.

粉笔：一支粉笔或带颜色的粉笔状物，用以在黑板上或其他物体表面作标记

If your teacher says,"I have run out of chalk" in the process of lecturing, the act of saying is locutionary, the act of demanding for chalk is illocutionary, and the effect the utterance brings about is perlocutionary (one of the students will go and get some chalk).

如果你的老师说，&我已经用完粉笔&的过程中，讲课，该法是言说，该法的要求粉笔是言外，效果带来的话语是成事（一名学生将去获得一些粉笔）。

Chalk up to prepare, chalk up to focus, and chalk down to move into action.

粉笔了准备，粉笔最多的焦点，和粉笔下跌动议转化为行动。

Teacher, Shen mentioned formula replicability reasoning using mathematical methods, often with red, yellow and blue chalk in turn show the hands of this teacher, Shen, colored chalk, such as beating of the notes, images, vivid, so that we are both relaxed and learn together happy; Shen teacher also used chalk powder into the suspension liquid foam, and emulsion, the solution can be compared; to chalk on the throw, drop to indicate what is the role of inertial motion and gravity; is to compare chalk down chalk placed on the desktop Pressure Size ......

沈老师讲到公式的举一反三，在用数学方法进行推理时，往往用红、黄、蓝粉笔依次展示，沈老师手中这彩色粉笔如跳动的音符，形象、生动，使我们学起来感到既轻松又愉快；沈老师还用粉笔灰泡成悬浊液，与乳浊液、溶液进行比较；将粉笔上抛、下落来说明什么是惯性运动和重力作用；正倒放置粉笔来比较粉笔对桌面压强的大小……总之，每一节每一课，沈老师的粉笔都有妙用。

I am also a teacher, I think that inhaling chalk to reduce the school at the end, it is necessary to use good quality chalk, chalk dust, like dust or less, and second, to take chalk and write when you should pay attention to the posture of as far as possible not to chalk break.

答：我也是一名教师，我认为吸入粉笔，以减少在最后学校，必须使用优质粉笔，粉笔灰尘像灰尘或更少，二，采取粉笔写时要注意尽量不粉笔打破态势。

About my company's fraternity licensing AS800 Series Electric chalk machine is the most advanced high-quality chalk production equipment, this plane is to improve the original chalk production process of the work of inefficient and labor intensive, serious waste of raw materials, and Products appearance Rough, poor quality, low Youzhi Pin to the characteristics hinder the development of productive forces and improving the quality of products.

我公司生产的友爱牌AS800系列电动粉笔机是目前国内最先进的优质粉笔制造生产设备，本机是改进原有的粉笔生产过程存在的工作效率低，劳动强度大，原材料浪费严重，且产品外观粗糙、质量差、优质品率低的特点，阻碍了生产力的发展和产品质量的提高。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。