形容词
中文翻译：Unknown
同义词：
['inner', 'internal']
例句：
-
1.The book is about the history of the United States.
这本书是关于美国历史的。
-
2. He was so busy that he forgot to eat breakfast.
他太忙了，忘了吃早饭。
-
3.She kept her emotions inside and didn't show them to anyone.
她把情感藏在心里，没有向任何人展示。