Cdkey
n. 激活码；序列号
🗣️ 情景例句
Really, Grandpa?
真的， 爷爷？
Content is happiness.
知足常乐。
it has to develop (partly by means of touch) the ability to judge roughly three-dimensonal distances.
儿童必须发展（部分通过触觉）粗略判断三维空间距离的能力。