upside [ˈʌpsaɪd]

以下由轻松背单词网站提供

n.上侧，上段，上部

the advantage of a situation

The children hung the picture upside down. 小孩把画挂倒了。
If you turn the envelope upside down, the key will fall out. 你如果把信封倒过来，钥匙就会掉出。