查询词典 grain

First, from room temperature to 500oC, the shell structure is amorphous with crinkly and airtight character. The shell structure begins to change into γ-Al2O3 and α-Al2O3 at 900oC. The surface of shells shows nano-sized pores at 900oC from SEM and BET analyses. When heated to 1000oC and 1100oC, the shell forms stable α-Al2O3 structure with smooth surface. Cracks often occur at the triple grain junctions. The specific surface area and the total pore volume of the hollow spheres increase with the calcination temperature.

首先，将锻烧温度由室温提升至500℃时，球壳属非晶相皱褶状致密结构；在900℃时开始有γ-Al2O3相及些许的α-Al2O3相出现，由SEM及BET结果得知，900℃之球壳表面有许多奈米级孔洞出现；当加热至1000℃和1100℃时，球壳形成稳定相之Al2O3结构，壳层表面趋於平滑，且球壳在晶界处有微裂缝存在；由BET 结果得知，比表面积及总孔洞体积会随锻烧温度之增加，有增加之趋势。

Potatoes are a good source of nutrients. And farmers can plant them i n rotation with grain crop s.

马铃薯是很好的营养来源，农民们也可以将其与其他谷类作物交替种植。

A great amount of cropland will be lost by the urban expansion and threat the grain safety in China.

城镇居民点用地扩展占用大量的耕地资源，从而造成耕地资源的大量减少，威胁中国的粮食安全。

They are very important for protecting grain crops.

他们对于谷类作物的保护是非常重要的。

For a hollow-cylindrical grain, this is the cross-section area of the core.

一个空心圆柱粮食，这是横截面面积的核心。

Where A p is the flow area of the grain and A t is the throat cross-sectional area.

如果一个P是流量辖区内的粮食和一吨是喉咙截面积。

Cut or used for cutting crosswise or across the grain.

交叉的切、用来交叉的切或者对着横纹切。

I have not a crump of comfort, not a grain.

我没有一点宽慰，---没有一丝一毫。

The paper discusses the grain compressibility,crushability,shearing and strength characteristics of coral sand and points out that it has the characteristics of high porosity ratio,high friction angle and low strength.

特殊的物质组成、结构和发育环境导致珊瑚砂具有独特的工程性质。文章综述了珊瑚砂的压缩性、破碎性、剪切特性和强度特性，指出了其显著的土力学特点：高孔隙比、高摩擦角和低强度值。

The structures and orientation texture evolution of UFG-Copper during AARB were studied and the results were as follows:(1)Whenεis lower or equal to 1.6,the slips happen on grain boundaries and crystal planes owing to the shearing force.There occur many sub-grains possessing small angle boundaries and 5μm grains sizes within the big grains.

研究了大变形异步叠轧制备超细晶铜材过程的组织和取向织构变化情况，结果表明：(1)变形等效应变ε≤1.6时，剪切应力的作用使晶粒与晶粒之间发生滑动，部分晶粒内部晶面发生滑移，大晶粒内部转变为许多具有小角度晶界、大小为5个微米的亚晶。

However it can often be frust ating for a child when people are unable to pronounce their name.

但它往往可以令人沮丧的一个孩子当人们无法断言他们的名字。

All these compounds were obtained from this genus for the first time. Compound, 4-cumylphenol, was a new nature product.

所有化合物均为首次从本属海藻中分离得到，其中4cumylphenol为新天然产物。