post是可數名詞么？

post是可數名詞。

Space out the posts three meters apart .把這些柱子間隔三米排開。

I sent him an invitation to the wedding by post.

我將婚禮邀請函郵寄給他。

He leant against the post and it broke .他往桿子上一倚，桿子就斷了。

He could not immediately accept the post.他不能馬上接受這一職位。