Nonvariational
非变分的
🗣️ 情景例句
He really likes to play the field.
他不喜欢做出承诺。
Joy to the world!
给这个世界欢乐！
When it has been decided where we are going to drill, we put up at the surface an oil derrick.
当确定钻孔地点后，我们就在那里竖起一个井架。