top drawing的用法和樣例：
例句
- You should see the double particles in the Top viewport like this.
你將在頂視圖中看到兩層粒子。 - Next, if you could foldthe top and right-side views forward,you would have an orthographic projection showing threeviews of the object.
接下來(lái)，如果你將頂視圖和右側視圖向前翻折的話(huà)，你就會(huì )得到一個(gè)能夠顯示該物體三視圖的正交正投影。
