Megnetron
磁控电子管
🗣️ 情景例句
I'll go to him.
我去。
The homework took me a whole day.
做家庭作业花了我一整天的时间。
This shows how long it was before we deemed it necessary to make sure that all our children could share in the knowledge accumulated by the'happy few' during the past centuries.
这说明，经过了多么漫长的时间之后，我们才认识到，有必要确保我们的孩子享有多少个世纪以来由‘少数幸运者’所积累起来的知识。