This was already cast as the correct class of product object, so you do not need to cast it yourself.
这时产品对象已经被转换成为了正确的类，所以您不需要自己再次的转换它。
Here you simply check the entry as an object, but what about after you send it off as an actual feed?
此处您只是把条目作为对象进行检查，但是把它作为实际的feed发送之后会怎样呢？
Once you have the Entry object, you can manipulate it just as before.
获得Entry对象之后，就可以和前面一样对它进行处理了。
In theory, you can take any and represent it as an object in your program.
在理论上，你可以得到它的所有数据并且在你的程序中把它作为一个对象来使用。
As you see above, at first, we declared a Command object then instantiated it.
如同你看到的，首先，我们声明一个Command对象，接着初始化它。
Tighten your stomach muscles as you lift the object or lower it down.
提举或者放下物体的时候收紧腹部肌肉；
Tighten your stomach muscles as you lift the object or lower it down.
提举或者放下物体的时候收紧腹部肌肉；
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