当然，随着年龄的增长，我们的大脑会出于很多原因而衰退，包括环境影响和遗传因素等。
Of course, our brains can decline as we grow older for lots of reasons including other environmental influences or genetic factors.
原因在于，企业在哪里生产商品，汇率只是一个影响因素。
The reason: The currency is only one factor that influences where companies make things.
也许主要的因素是赛车的空气动力学原因，我们应该着眼于减少空气动力学的影响，但这将是一个非常长期的过程。
Maybe because the main factor on these cars is the aerodynamics, we should look at reducing the aero effect, but that would be a very long term project.
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