1
the upper side of [sth]
The upper side of the table is smooth.
桌子的上面是光滑的。
上侧；上面；上部
upper sides — plural of upper side
先理解核心含义，再看它在真实句子里的用法。
上侧；上面；上部
the top surface or upper part of something
The upper side of the table is smooth.
桌子的上面是光滑的。
任何物体的最上面一侧
The uppermost side of anything
The upper side of the table has a few scratches.
桌子的上面有几道划痕。
Turn the board over so the upper side faces down.
把板子翻过来，让上面朝下。
You can see the rough upper side of the leaf.
你能看到叶子粗糙的上面。
The upper side of the table is smooth.
桌子的上面是光滑的。
There is a scratch on the upper side of the laptop.
笔记本电脑的上面有一道划痕。
注意：通常后接'of'短语指明对象。
The light comes from the upper side of the room.
光来自房间的上方。
Not this
The book is on upper side of table.
Use this
The book is on the upper side of the table.
缺少冠词 'the'，因为 'upper side' 在句中特指某个物体的上部，需要定冠词。
Not this
The bird sits in the upper side of the tree.
Use this
The bird sits on the upper side of the tree.
介词搭配错误，表示在物体表面上应用 'on'，而不是 'in'，因为 'upper side' 指表面。
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页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.