人们根据建筑物如何处理由重力产生的向下的力来分析它们。
Structures can be analyzed in terms of how they deal with downward forces created by gravity.
我注意到一些小动作，脑袋向下的一沉、肩膀的一抽动。
I noticed little things, a dip of the head, a twitch in the shoulder.
本文中的示例遵循自顶向下的方法。
它同样是，开口向下的一条抛物线。
那是起点在1且开口向下的抛物线。
不过也带有负号，因为这是向下的。
反之则显示一个向下的箭头。
我们可以画出这样的开口向下的抛物线。
从而法向量的方向是竖直向上或向下的。
The normal vector is just sticking straight up or straight down.
所以也有向下的力，图钉上的力mg向上。
Mg so also here we have now mg down, so we have at the pin mg up.
现在我,还在电梯里,这次是向下的加速度。
Now I am going to put you in the elevator-- here you are and I'm going to accelerate you down.
自顶向下的管理支持不应该与铺展过程相混淆。
The top-down management support should not be confused with the rollout approach.
这个经济上的裂口再次对价格形成向下的压力。
This gaping economic hole is again putting downward pressure on prices.
高原效应尚可接受，向下的斜坡呢？
但是在富国工资水平向下的压力可能会持续很久。
But downward pressure on wages in rich countries could continue for a long time.
然而，很少有体系架构是完完全全的自顶向下的。
However, it is rare for an architecture to be totally driven from the top down.
他们也认同自顶向下的方法需要更多业务的介入。
They also agree the top-down approach requires much more business involvement.
相对照来看，多数向下的流动转变为美元和欧元。
In contrast, most downstream flows go into dollars and euros.
自顶向下的方法就是在单个项目阶段中实现数据仓库。
The top-down approach is to implement the data warehouse in a single project phase.
使用向下的箭头来选择From和To日期(图7)。
自顶向下的开发模式包括以下开发步骤（如图2 所示）
The top-down development pattern encompasses the following development steps as illustrated in Figure 2
自顶向下的实现需要在项目开始时完成更多计划和设计工作。
A top-down implementation requires more planning and design work to be completed at the beginning of the project.
你或许感到现在你的生活是一个巨大的向下的斜坡。
You might be feeling like your life right now is one giant downhill slope.
明显的是，纯粹的自顶向下的方法在此场景中也是不理想的。
Clearly, a purely top-down approach is not ideal in this scenario.
这并不是传统的自顶向下的组织看待事情的方法，是这样么？
And it's not the traditional top-down organizational look at things, right?
如果过程化编程是自顶向下的，事件编程是自底向上。
If procedural programming is top-down, event programming is bottom-up.
从事资产管理策略的一个关键要素，是具备自顶向下的管理支持。
A critical element to pursuing an asset management strategy is to have top-down management support.
Michael再次按下向下的按钮，是同样的结果。
美联储将尽其所能以确保这一变动方向是向下的（即失业率下降）。
The Fed will do all it can to ensure that the next direction is down.
现在想象得到的图像,当你垂直切割它时，它是开口向下的抛物线。
And now, you should imagine that you have this thing that when you slice it by a vertical plane, looks like a downward sparabola.
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