Cavity radiation
[电] 空腔幅射
🧩 词语组成解析
🗣️ 情景例句
I can't express myself very well in English.
我用英语表达不好。
She won't be in until 10:45, so the earliest would be 11:00.
她要到10:45才来，所以最早也得到11点才能看。
Don't crowd round him, said the gate keeper.
“不要围着他，”学校门卫说。