因为我能拉牦。
I can measure that, because I pull it by one centimeter and I find the acceleration it exerts on a known mass.
我可以测量它了,因为我把它拉到了一厘米,我发现它对一个已知质量施加的加速度。
Since it was released I’ve read a lot more books simply because my smartphone is always with me and I can pull it and read a few pages anytime I’ve got a couple minutes free.
因为手机随身携带,我任何时候有空闲都可以拿出来读上几页,这让人感到很轻松。
Now I can measure that, because I pull it by one centimeter and I find the acceleration it exerts on a known mass.
现在就能测量这个力了,因为把弹簧拉伸 1 厘米,我就知道它让一个质量已知的物体产生的加速度
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