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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.

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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.

《柯林斯英汉双解大词典》

With a thousand pains that vision's face was grained; Yet no blood reached there from the upper ground, And no guns thumped, or down the flues made moan.

惊恐中担心想象中的那些脸庞有了细纹;,前方的战场上没有血流成河，没有枪炮的轰鸣，或者向下指着的冒烟的枪口下的哀求。

耶鲁公开课 - 现代诗歌课程节选

Then the--so the term structure was downward-sloping until about two and a half years and then it was upward sloping.

期限结构线先向下倾斜,在到期期限过了两年半的时点后,才缓慢回升

耶鲁公开课 - 金融市场课程节选

The other chain is facing in the other direction, the 3' carbon is up, the 5' carbon is down.

对面的那条单链方向相反,3'位的碳原子向上,5'位的碳原子向下

耶鲁公开课 - 生物医学工程探索课程节选