And quicker than you could shut your eyes that frogwould jump straight up and catch a fly off the table.

VOA: special.2009.08.29

And if we do, in fact, hit it with light to get the electrons off, it will go back to the straight up in position, or if it gets knocked hard enough it does that, too.

而且如果我们这么做，事实上，用光轰击它以逐出电子，它就会在原位置沿直线返回，或者如果它被撞击的足够猛烈,也会出现上述现象。

麻省理工公开课 - 化学原理课程节选

It starts out in a straight line and then it hops off on a diagonal.

马以直线出发但必须飞对角线。

耶鲁公开课 - 1945年后的美国小说课程节选

Can't my mind take off from there and push straight ahead to the idea of the perfectly straight, even if I never have encountered it before?

即使我之前没有直接碰到过,难道我的心灵不能借此来推断出,完美的直线是什么样子的吗

耶鲁公开课 - 死亡课程节选

The force may taper off, the force may not be given by a straight line, but for modest deformations, every spring will have a linear regime in which the force is linearly proportional to the stretching.

它产生的力可能会渐渐消失,力的曲线可能不是一条直线,而有轻微的弯曲,每个弹簧都有一个线性区间,在这一区间内,力和伸长量是线性关系

耶鲁公开课 - 基础物理课程节选