单三可以是任何锯齿型或者平台型，而三角形也可以作为此类组合的最后一个“单三”出现。

"While a single three is any zigzag or flat, a triangle is an allowable final component of such combinations and in this context is called a" three.

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与电系统稍有不同的是，这种方法需将机械系统结构图作适当的改形。改形也很简单，只要将串联形式的质量元件改为并联即可。

Differing from electrical system, the structural diagrams of mechanical system need the change of series combinations of mass elements into parallel combinations, which is very simple.

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即使是一个瘦形梁龙，曾经被认为在活着的时候重达5.5吨，现在也减重了1.5吨。

Even a slender diplodocus, once believed to have tipped the scales at five and a half tonnes when alive, has lost a tonne and a half from its weight.

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When men gain weight they tend to distribute it above the waist, abdominal obesity, or what's called the apple shape.

当男性体重增加,他们的身体趋向于,把脂肪储存在腰间,也就是腹部肥胖,也就是我们所说的苹果形身材

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

See gargantuan hooked fingers Pluck in supreme flesh To smutch supreme littleness.

看庞大的勾形的手指,拖拽那高尚之肉体,将那最微之卑劣也弄脏。

耶鲁公开课 - 现代诗歌课程节选

Women tend to distribute the fat in the lower part of the body, below the waist, in what's called a pear shape.

女性则趋向把脂肪储存在下半身,在腰部以下,也就是我们通常所说的梨形身材

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选