mean aerodynamic center

例句：

1. 1. This means that we need to work harder.
   这意味着我们需要更努力工作。
2. 2. The meaning of life is to live it fully.
   生命的意义在于充分地生活。
3. 3.The word "mean" can have different meanings depending on the context.
   “mean”这个词可以根据上下文有不同的含义。