If you remember what we did several times, well, along the circle that vector field now is tangent to the circle.
我们做过若干次了，沿着圆，向量场与圆相切。
We have talked about truck customization several times recently, and now we are ready to tease you even more!
我们已经谈到了最近几次卡车定制，现在我们已经准备好逗你更多！
Why did you play truant today? I've told you several times that studying is the most important thing in your life now.
今天你为什么逃学？我已经跟你说过多少次了，现在在你的生活中学习是最重要的事。
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