Nondirectional
[电] 无向性
🗣️ 情景例句
What's wrong, Susan?
怎么啦， Susan？
I meet the boy whose aunt is a typist.
我遇到那个男孩的姑妈是打字员。
When, for example, a customer first opens an account,
比如，储户首次在银行开户时，