Why should that apple always descend perpendicularly to the ground, thought he to himself... Why should it not go sideways, or upwards?
他心想，为什么苹果总是垂直落到地面？
Such surfaces reflect most of the bats' echolocation energy away from it, but some energy hits the surface perpendicularly, sending an echo back directly beneath the bat.
这样的平面反射了大部分蝙蝠的声波，但是有一部分能量垂直撞击到表面上，声波回传至蝙蝠。
About the 15th of May the keel of the new vessel lay along the dockyard, and soon the stem and stern-post, mortised at each of its extremities, rose almost perpendicularly.
5月15日前后，新船的龙骨已经搁在造船所了；不久，船首材和船尾材也已用榫头分别接在龙骨的两头，几乎直立起来。
It seemed at times that we were climbing almost perpendicularly.
有时我们好像几乎是在垂直向上爬。
A type of surface wave in which particles oscillate horizontally and perpendicularly to the direction of wave propagation.
一种面波，质点水平地振动，并垂直于波传播的方向。
A bolt hole is formed in the shaft body in such a manner as to substantially perpendicularly intersect the axis of the shaft body.
螺栓孔以与所述轴体的轴线基本上垂直相交的方式形成在所述轴体中。
Once initiated, cracks would propagate perpendicularly to the loading direction and the specimens exhibited transgranular fracture.
裂纹形成后垂直于加载轴方向扩展，试样呈穿晶断裂。
Based on the variable structure control theory, a guidance law that can perpendicularly impact on the target was proposed in this paper.
基于变结构控制理论，提出了一种垂直命中目标的导引律。
The perpendicularly rotating siamesed wind wheel has the advantages of simple production and processing, easy installation, high intensity and low cost.
本实用新型生产加工简单、容易安装、强度高成本低。
The crack arresting problem in a thin current carrying plate was studied for the situation of providing a DC current perpendicularly toward the crack direction.
研究了带有有限长裂纹的导电薄板在垂直于裂纹的方向上通入直流电流时，裂纹的止裂问题。
Usually being located at the middle of the cristae of vertical semicircular canals, the eminentia cruciata protrudes perpendicularly to the long axis of the crista.
十字隆凸通常位于上、后半规管壶腹嵴的中部，与壶腹嵴的长轴垂直。
The composite film is formed by coating perpendicularly-aligned carbon nanotubes with a polymer selected from poly (vinyl acetate), poly (isoprene), or blends thereof.
通过用选自聚乙酸乙烯酯、聚异戊二烯、或其共混物中的聚合物涂布垂直定向碳纳米管，从而形成复合材料膜。
Using the slider to drive a metal bar to cut perpendicularly the uniform magnetic field in the center of a Helmholtz coil, induction electromotive force could be produced.
利用滑块带动金属杆切割亥姆霍兹线圈中心区域匀强磁场的磁感应线，可以产生感应电动势。
Seen from front or rear, the forelegs, as well as the hind legs below the hock joint, move perpendicularly to the ground, with some tendency towards a single track as speed increases.
从前面或后面观察，前腿，也包括后腿飞节以下部位，运动时完全垂直于地面。当速度增加时，有单一轨迹的趋向。
Instead of using one sensor to measure the direction, this system uses three perpendicularly mounted sensors to measure one direction so as to avoid the sensibility loss on small angle.
在方向的测量中使用了三个传感器代替传统的单个传感器测量以减小加速度计与磁通门计在较小角度时灵敏度的下降。
The spacers 56 are not limited to extended generally perpendicularly from the internal face 46, to being integrally molded with the air cowl 44 or to having a generally cylindrical-shape.
间隔件56不限于从内部面46处大致垂直地延伸，以及与空气通风帽44一体模塑成型或者具有通常的圆柱形状。
Electric field applied perpendicularly to the layer of quantum wells can change the optical properties(abstraction, reflection and photoluminescence)of semiconductor quantum well structures.
而在垂直于量子阱平面的方向外加电场可以显著的改变半导体量子阱结构的光学性质（如吸收、反射、光致发光等）。
Electric field applied perpendicularly to the layer of quantum wells can change the optical properties(abstraction, reflection and photoluminescence)of semiconductor quantum well structures.
而在垂直于量子阱平面的方向外加电场可以显著的改变半导体量子阱结构的光学性质（如吸收、反射、光致发光等）。
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