重力

But without a raptor's sharply honed sense for the gravity-defying updrafts, humans are beholden to chance.

但是如果没有猛禽们对克服重力的上升气流敏锐的判断力，人们常常错失良机。

In updrafts, the authors claim, they fly just enough to counterbalance gravity. In downdrafts, they stop flapping and sink.

在上升气流中飞行，他们利用拍翅抵消重力的作用；而在下沉气流中，他们停止拍打翅，保持下沉。

The third chapter of this paper explored the method of acquiring amplitude-ratio,and also the significance of the amplitude and gravity data for the probing of the crust and upper mantle's structure is investigated.

本文第三章研究了相对振幅比的获取方法，探讨了利用振幅和重力资料模拟来约束地壳速度结构的有效性，从而形成本文层析成像工作的总体结构。

This makes the meter independent of gravity, allowing it to be used in any plane, even upside-down.

这使得独立米的重力，因此它可用于任何平面，甚至倒。

The gravity of this water column continuously produces the vacuum and so a vacuum pump is not needed.

水柱的重力不断地引起真空，所以真空管是不需要的。

Key words: gravity separation;equipment structure;flow behavior;residence t ime distribution;particle image velocimeter

关 键 词：重力分离；设备结构；流动特性；停留时间分布；粒子图象测速

In modern types such as the velometer and similar German instruments the plate is replaced by a small vane under spring instead of gravity control, which carries a pointer moving over a scale of air speed

在现代类型的仪器中，例如在速度计和类似的德国仪表中，这种摆动片已用一个小叶轮代替，叶轮利用弹簧控制而不用重力控制。叶轮上装有一个指针，可在标示有气流速度的刻度盘范围内移动

There exist the important information of gravity field and vertical component of geometrical position.

重力与水准观测值中都含有重要的重力场信息与点位垂直分量的几何信息。

Through concretely analyzing the magnitude and error of deflection of the vertical, we can get the results that the long-period, smaller-range non-tidal variations are commonly less than the tidal ones, but the short-period, larger-range non-tidal variations are comparable to the tidal ones, especially in some areas they are even bigger than the tidal ones, this state can be measured by repeated gravimetry completely.

通过对垂线偏差量级和误差大小的具体分析，得出结论：一般长周期的、幅度较小的非潮汐变化要小于潮汐变化，但短周期的、幅度较大的非潮汐变化则可能与潮汐变化相当，个别地区甚至还会超过潮汐变化，这种情况完全可以用重复重力测量的方法检测到，这也说明重复测量的方法是可行的。

When the float upward force and float suffered gravity, buoyancy and viscous forces of the force equal to three when the float is in equilibrium.

当浮子上升的力与浮子所受的重力、浮力及粘性力三者的合力相等时，浮子处于平衡状态。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐