力三角形

triangle of forces的用法和样例:

例句

  1. He outlined the triangle in red.他用红笔画出三角形。
  2. He swept a triangle with his finger.他用手指在空中画了个三角形。
  3. Put small triangle plastic here.在这里放一片小的三角形胶板。
  4. By making a force triangle, the force in the connecting rod can be determined.作出力的三角形,可以决定连杆中的力。

[00:03.94]第六课 形状 [00:07.89]What can you see? [00:12.37]你能看见什么? [00:16.85]I can see five circles and eleven squares. [00:22.78]我可以看见五个圆卷和十一个正方形。 [00:28.71]a circle [00:31.20]一个圆形 [00:33.70]a square [00:36.43]一个正方形

发表于:2018-12-13 / 阅读(223) / 评论(0) 分类 小学英语深圳双语版二年级

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发表于:2019-01-16 / 阅读(197) / 评论(0) 分类 2018年NPR美国国家公共电台3月

I think the part that Lauras talked about that it has the year 48 on it, and the size of this plan and some other things, I think we may have found the DC3 that disappeared in 1948.That is my real hunch. And I really don't see many other options for

发表于:2019-01-22 / 阅读(185) / 评论(0) 分类 自然百科2010年

It's very hard to tell. We've just hit the water. It's very hard to tell what altitude we're at. We've crashed the airplane at 930 feet. It seems clear that flying into that methane caused enough confusion in the instruments and with Thomas and he en

发表于:2019-01-22 / 阅读(214) / 评论(0) 分类 自然百科2010年

The couple use global-positioning coordinates to close in on the underwater wreck. We're about 3.6 miles away and its directly southeast from this location. A dark shape looms in the water. It's pretty close. It's easy to be fooled by clouds flying o

发表于:2019-01-22 / 阅读(185) / 评论(0) 分类 自然百科2010年

You don't have to move far up shore before the depths are tremendous and to be able to find an individual wreck in depths like that would be extremely difficult even with modern multibeam sonar technology, and certainly, incredibly difficult with a t

发表于:2019-01-22 / 阅读(175) / 评论(0) 分类 自然百科2010年

They looked for anything that may help identify the plane in the murky depths. You can see that may be 2,3 meters in front of you, yet at back, tremendous bottom motion of the water, if you dont hang on to something, it will move you really quickly.

发表于:2019-01-22 / 阅读(160) / 评论(0) 分类 自然百科2010年

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发表于:2019-01-22 / 阅读(167) / 评论(0) 分类 自然百科2010年

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In our world of scientific discovery, one mystery endures. The Hoodoo Sea, the Limbo of The Lost, some seeing mysterious forces at work, others the powers of sea and storm. We dive into the deep. It appears to be a large military plane. And unleash s

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In 1945, five Avenger torpedo bombers left from Fort Lauderdaleon a training mission, and they flew off into oblivion. We'regoing to fly east. We're flying too far north. We think we're 225 miles east of base. Their names would go down in history as

发表于:2019-01-22 / 阅读(163) / 评论(0) 分类 自然百科2010年

Gerrallan needs to escape the fast-developing cloud in order to survive. The tunnel was rapidly getting stronger, and it was a little lower at ten thousand feet to the center of the tunnel so we aimed for that opening and started descending down at f

发表于:2019-01-22 / 阅读(168) / 评论(0) 分类 自然百科2010年

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发表于:2019-01-22 / 阅读(244) / 评论(0) 分类 自然百科2010年

Its two passengers are conducting an investigation into what they call electronic fog, a vapor that they think causes disappearances within the Triangle. Pilot Bruce Gernon needs to land the aircraft as soon as possible. The plane touches down safely

发表于:2019-01-22 / 阅读(241) / 评论(0) 分类 自然百科2010年

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发表于:2019-01-22 / 阅读(221) / 评论(0) 分类 自然百科2010年

Some believe that massive underwater landslides or earthquakes can violently release gas from a substance called methane hydrate trapped beneath the sea bed. As its escaping bubbles rise, they lower the density of the surrounding ocean. The ship drop

发表于:2019-01-22 / 阅读(144) / 评论(0) 分类 自然百科2010年
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