Keys
n. 关键帧；（钢琴等的）键；密钥（key的复数）
🗣️ 情景例句
Some people seem too think its for practicing grammar rules and learning lists of words.
一些人认为它是用来操练语法规则和学习一大堆单词。
You should have your suit cleaned and ironed.
你应该把你的套装拿去洗烫一下。
I haven't met him yet.
我还没见过他。