游戏的操控要尽可能的简单，但不能简单过度。
Game controls should be as simple as possible, but no simpler.
但不能简单地说我们是为了培养后代而必须亲密起来。
But this is not a simple case of needing to bond in order to raise offspring.
物理学中充满了看似简单，但不能简单解释的现象。
Physics is rich in phenomena that are simple in appearance but cannot be calculated in simple terms.
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