把它们放在一起，用小角近似值。
I bring them together, and I use the small-angle approximation, small angles.
但是你不用用弹簧，做小角近似值，就像我们用摆做的一样。
But you never had to make any small-angle approximation with the spring as we had to do with the pendulum.
现在我们要，取近似值，我们将要取的，这个近似值，是我们经常在，物理上看到的-，我们称之为，小角度近似值。
And now we're going to make some approximations, and the approximations that we will make which we will often see - in physics when something oscillates — what we call the small-angle approximations.
所以，在小角度近似值中，就等于mg, that,I, can, make,t, the,same, as, mg。，这是近似值，但是依然写等于号。
So I simply have, in my small-angle approximation, t It's approximately, but I still put an equals sign there.
当光斜入射时，在新坐标系下采用小角度近似，琼斯矩阵方法可以在极小的误差下有效使用。
With the wave slanting and a small Angle approximated in a new coordinate system, the Jones matrix method could be used effectively with a small error.
在小角位移的情形下，可近似得到相应的无阻尼线性系统的固有频率，它与观测结果吻合。
In the case of small angular displacement, the natural frequency of the corresponding damping-free linear system is obtained, which is consistent with the experimental observation.
根据相干分布源的近似模型可知，在小角度扩展情况下，角度扩展主要影响广义方向向量各元素的幅度。
Based on specially array geometry designation, the angular spread could be estimated by substituting the estimated DOA into the amplitude information vector.
根据相干分布源的近似模型可知，在小角度扩展情况下，角度扩展主要影响广义方向向量各元素的幅度。
Based on specially array geometry designation, the angular spread could be estimated by substituting the estimated DOA into the amplitude information vector.
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