Since, at the time, there was no wind I could observe very distinctly and actually measure the displacement of the pieces of paper that were in the process of falling while the blast was passing.
因为在爆炸前，我清晰地观察到确实没有风造成飘落的纸片偏移。
2
They observe our every click (where they can) and they measure in milliseconds how long it takes us to decide.
Google会观察我们的每一次点击，然后以豪秒计算我们在页面上的停留时间。
3
While it is easy to measure the effects of gravity on grander planetary or even galactic scales, the force's weakness has meant its detailed nature has been difficult to observe up until now.