向下

In this manner, the negative charge hops downward from leader to leader like a frog jumping from lily pad to lily pad across a pond.

这样下来，负电荷一次次的向下跳跃，就好像青蛙从一个睡莲叶子跳向另一个穿过池塘一样。

She drew back once more, and before the thing could recover and blast her—she again struck a hammer blow.

她再次向后移动，在那个东西恢复和毁灭她之前——她再一次向下猛烈锤击。

The particles with heavy specific gravity are discharged from the underflow mouth and those with light specific gravity are discharged through the overflow pipe and thus it realizes the separation for heavy and light particles.

流体自旋流器上端给入并在旋流器内形成强制旋转流，旋转流将颗粒按粒度和比重分为内外环层，当矿浆流动至锥体部分时，由于锥体的突然变向，阻力增大，颗粒群向下运动的趋势减缓，并在此形成旋转悬浮层，随着离心力场的减弱，重力作用越来越明显，由按粒度和比重分成的内外两层逐渐转化为按比重分选的上下两层，比重大的颗粒通过底流口排出，比重小的颗粒则通过溢流管排出，从而实现轻重颗粒间的分离。

The activities are high in the topsoil and low in the subsoil, decrease from rhizoplane soil to root-free soil for all three enzymes.

从表层土向下，由根表土向外，碳矿化速率及其相关的各种酶活性均呈下降趋势。

The invention discloses an organic compost turner, which consists of a turning part and a walking chassis. The walking chassis includes a chassis frame, a power part, a power transmission device, and a walking wheel. The invention is characterized in that: the turning part, arranged above the walking chassis, includes a motor frame, a major motor arranged on the frame, a transmission mechanism, and two horizontal scraper conveying chain mechanisms arranged symmetrically. The front end of the motor frame is arranged on the chassis frame of the walking chassis. The master motor drives the two horizontal scraper conveying chain mechanisms through the transmission mechanism. Scrapers of the two scraper conveying chain mechanisms move from the external side to the internal side at the front end of the turning part separately.

本发明公开了一种有机堆肥翻抛机，该机由翻抛部件和行走底盘组成，所述行走底盘包括底盘架、动力部件、动力传动装置和行走轮，其特征在于：所述翻抛部件设置在行走底盘的上方，其包括机架和安装在机架上的主电机、传动机构及对称设置的两个卧式刮板输送链机构，所述机架前端向下倾斜安装在行走底盘的底盘架上，所述主电机通过传动机构驱动两个卧式刮板输送链机构，两个刮板输送链机构的刮板分别在翻抛部件的前端从外侧向内侧运动。

Think of the bottom bracket as a focus your arms pulling down and back; helping to pivot and press the rear tire in the ground.

试着想象以B.B。为中心，腿部向下及向后拉的动作有助于将后轮压于地面上，而运用辅助把手，也会增加出力。

Think of the bottom bracket as a focus your arms pulling down and back; helping to pivot and press the rear tire in the ground.

试著想像以B.B。为中心，腿部向下及向后拉的动作有助於将后轮压於地面上，而运用辅助把手，也会增加出力。

He raised the wand above his head, brought it swishing down through the dusty air and a stream of red and gold sparks shot from the end like a firework, throwing dancing spots of light on to the walls.

他将魔杖举过头顶，然后在漂浮着灰尘的空中向下一挥，一蓬红色和金色的火星如同焰火一般从杖尖爆出，向墙上撒出欢跳的亮点。

Based on the characteristics of parameterized design and key technologies of knowledge based engineering, and specially according to the characteristics of the construction, figure, assembly-parameter of bicycle frame design, the article has achieved repeated using of experiential parameter and knowledge by adopting methods such as automatic reading experiential datasheet, computing parameter by making use of program, manual data-input or modifying and so on. Based on analyzing the characteristics of Rear End design and the associated characteristics with Chain Stay and Seat Stay, different design methods are analyzed in detail, and rapidly assembling of Rear End, Chain Stay and Seat Stay is achieved by using the method of combining top-down-assembly with down-top-assembly method. Based on analyzing special technologies and UDF characteristics, the repeated using of different sectional shapes by using UDF technology on the tube section design is also achieved, and this will greatly shorten the time spent on fixing the dimensions and orientations on sketches.

在探讨了参数化设计技术特点和知识工程关键技术的基础上，针对自行车车架设计中的结构、形状、装配参数特点，分别采用了读入经验数据表、参数程序求解、手工录入或修改方法实现车架设计经验参数和知识的重复利用；在分析自行车后叉片设计特点及与平、立叉的关联特性的基础上，对不同的设计方案进行了详细分析，并采用自顶向下和自底向上相结合的方法，实现了后叉片的快速装配定位与平、立叉设计相关联；在分析了特征技术和UDF特点的基础上，将UDF用于管件截面的设计上，使各种截面形状能不断重复利用，大大节省了约束草图尺寸和位置的时间。

4The salt moving downwards to the bottom soil (80~100cm) and salt accumulating upwards to the topsoil (0~20cm) were very obvious in greenhouse soils.

4盐分在设施土壤中的运移同时存在着向下迁移和向表层聚集两种方式，且以表聚为主。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷