，x的取值范围,应该是具体的数字，我的问题是，如果看所有的这些黄色切面,哪一个是我首先要考虑的？
Well, the range for x should just be numbers. OK, remember, the question I have to ask now is if I look at all of these yellow slices which one is the first one that I will consider?
如果交通灯是红色或黄色，我知道我不能过马路，所以我等待。
If the traffic light is red or yellow, I know I can't cross the road, so I wait.
如果交通灯是红色或黄色，我知道我不能过马路，所以我等待。
If the traffic light is red or yellow, I know I can't cross the road, so I wait.
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