他们缺少真实世界互动的复杂性和深度。
They lack the complexity and depth of real-world interactions.
只有通过开头的背景陈述才能凸显它的复杂性和深度。
The complexity and the depth of Heather's experience must be seen against the background of what has gone before.
但是，给点时间，很快CSS就要向你展示它的复杂性的真实深度。
But, give it time. Soon, CSS will show you the true depths of its complexity.
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