Nondirectional
[电] 无向性
🗣️ 情景例句
If you cheat in a test, you've really only cheating yourself.
如果你在测验中作弊的话，你欺骗的只有你自己。
I asked him to do it for me, but he wouldn't.
我请他帮我做，但是他不肯。
They then knew that they had discovered the cause of the fire.
这时调查人员知道他们找到了发生火灾的原因了。