Inline elements:

1. respect left & right margins and padding, but not
   top & bottom
2. cannot have a width and height set
3. allow other elements to sit to their left and right.

Block elements:

1. respect all of those
2. force a line break after the block element

Inline-block elements:

1. allow other elements to sit to their left and right
2. respect top & bottom margins and padding
3. respect height and width

從畫面看的話如下圖：

圖片地址