Torsor
[数]非共面直线对
🗣️ 情景例句
Will you excuse me?
我失陪了
Knowledge will not be aquired without pain and application.
不花力气，不下功夫是得不到知识的。
To his astonishment, the bee began to perform a dance on the surface of the honeycomb.
冯·弗里施就透过玻璃进行观察。