Imagine waking up every morning and saying to yourself: "I refuse to accept the law of gravity.

想象每天早上醒来后对自己说：,“我拒绝接受万有引力定律。

哈佛公开课 - 幸福课课程节选

Imagine if an aeronautics engineer : woke up in the morning and said, "you know,the Law of Gravity thing really makes things difficult for me.

试想一下，如果一个航空工程师,在早上醒来，说，“万有引力,真的带给我很多麻烦。

哈佛公开课 - 幸福课课程节选

"By having more weight, the center of gravity goes up, " making the boat less stable, said Lt.

WSJ: Boat Operators Struggle With Heavier Load

At Oort-cloud distances, the strength of this combined gravity adds up to the same sort of force as that exerted by the solar gravitational field, enfeebled as it is by its remoteness from the sun.

ECONOMIST: X marks the spot

Encouraged by the wind, it defies gravity and flows up the gentle incline toward the trees.

NPR: Excerpt: 'Woodsburner'