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- It is indicated that the span and flexural stiffness of cavern roof, the dimension and brittleness of coal pillar, the uniformity of coal material and the size of mineral grain are the important factors influencing rock burst of coal pillar. 分析表明,顶板的跨径、顶板的抗弯刚度、煤柱的尺寸、谋柱的脆性、煤岩材料的均匀性和矿物颗粒的大小是煤柱岩爆的重要影响因素。
- These rocks are lack of foliation and resulted from the brittle fragmentation of mineral grains with rotation of grain fragments accompanied by fractional grain boundary sliding and dilatancy. 这类岩石缺乏面理构造,是由于矿物颗粒的脆性碎裂,旋转以及颗粒边界的磨擦滑动和扩展而造成的。
- These rocks are lack of foliation and resulted from the brittle fragmentation of mineral grains with rotation of grain fragments accompanied by fractional grain boundary sliding and dilatancy . 这类岩石缺乏面理构造,是由于矿物颗粒的脆性碎裂,旋转以及颗粒边界的磨擦滑动和扩展而造成的。
- Foliated fault rocks are characterized by well-developed foliation which is resulted from the preferred orientation of mineral grains in the rock. 片理化断层岩石具有发育良好的面理构造,这些面理是岩石中矿物颗粒优选定向而造成的。
- But we do have convincing information obtained from magnetized mineral grains in rocks that tells us that geomagnetic polarity reversals have occurred a great many times in the history of the earth. 但是我们确实从岩石破磁化的矿物颗粒中获得了令人信服的信息,这个信息告诉我们在地球史上曾发生了很多次地磁极性倒转。
- He doubles the parts of a farmhand and a miner. 在这出戏里他既扮演雇农又扮演矿工。
- The grain crop has gone down this year. 今年的粮食作物产量下降了。
- These rocks cool in a short time, for they are exposed to the air and give off heat and harden rather quickly. The mineral grains that form during this fast cooling do not have much time and chance to grow. 由于熔岩喷出地表接触空气,热散发快,岩石冷却结晶的时问短,岩石中矿物晶体没有足够的时间和机会生长。
- It possessed rich mineral deposits, including gold. 它拥有丰富的矿藏,包括黄金。
- The company is an international trader in grain. 这家公司是国际粮食贸易公司。
- The country possesses rich mineral resources. 这个国家有丰富的矿产资源。
- Their speculative buying of grain is illegal. 他们投机购买谷物是不合法的。
- No potassium did we find in this mineral. 在这种矿石中我们没有发现钾。
- Bad luck goes against the grain. 厄运总是令人讨厌的。
- Stores of grain are frequently attacked by pests. 储存的谷物经常受到害虫的破坏。
- A miner's lamp is fixed onto his helmet. 矿灯固定在矿工的头盔上。
- Our grain output will be3.7 times that of1960. 我们的粮食产量将是1960年的3。7倍。
- A bin for storing ore, grain, or other materials. 仓库储放矿石、谷物或其它材料的大箱
- A single grain of a cereal plant. 谷粒禾谷类作物的一个颗粒
- There isn't a grain of truth in his statement. 他的声明里没有一点是真实的。