Harmodotron
(产生毫米波的)电子束管, (正交场)毫米波振荡管
🗣️ 情景例句
I'm thrilled for you, Grandpa.
我真为你兴奋， 爷爷。
He has a book.
他有一本书。
Because the tree was mentioned in a newspaper, the number of visitors to Frinley has now increased.
就因为报上提到过这棵树，所以现在来弗林利参观的人越来越多。