In the experiments, the symmetric and antisymmetric modes, S1 and A1, were excited to detect hidden corrosion defect respectively using pitch-catch technique.
实验中，采用了一发一收法，并分别激励了对称模态s1和反对称模态A 1对该缺陷进行了检测。
The catcher wanted the pitcher to pitch out and see if they could catch the runner stealing.
捕手要投手投出一个远球，以看看他们是否能捉到盗垒的人。
Our centers of gravity are actually off-center, and we essentially pitch forward as we step, only to catch ourselves with our next step.
我们的重心实际上是偏离中心的，我们基本上是前倾的，我们一步，只赶上我们与我们的下一个步骤。
Our centers of gravity are actually off-center, and we essentially pitch forward as we step, only to catch ourselves with our next step.
我们的重心实际上是偏离中心的，我们基本上是前倾的，我们一步，只赶上我们与我们的下一个步骤。
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