地球也会坠向苹果-，因此地球上的力与地球的质量相等，再乘以地球的加速度。
Well, the earth is going to fall towards the apple — So the force on the earth is the mass of the earth times the acceleration of the earth.
新款机型与之前的iPhone 4在外形上非常相似，但配置了升级换代的摄像头，速度更快的处理器，以及为人瞩目的声控软件，这一软件可以使用户向手机发问。
The new model looks similar to the previous iPhone 4 but has an upgraded camera, faster processor and highly regarded voice-activated software, which allows users to ask questions.
文中在物面无滑移边界条件的基础上施加物面绕体轴的切向速度，通过求解定常ns方程对飞行器滚转进行模拟。
In the paper, the steady NS equation was solved to simulate aircraft roll by adding tangent velocity to no slip wall boundary condition.
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