Extensionality axiom
[计] 外延定理
🧩 词语组成解析
[计] 外延性
🗣️ 情景例句
How's my grandson?
我的孙子怎样啦？
Excuse me to have kept you waiting.
对不起让你就等了。
In the midst of all this movement, the weight and the pen would be still.
重物和笔都却不运动。