Core making machine
[机] 砂心机
🧩 词语组成解析
core
[kɔ:]
n. 中心，核心，精髓;果心，果核;[地质学]地核;[计] 磁心;
vt. 去（果）核，挖去…的果心;提取岩芯（样品）;
making
['mekɪŋ]
n. 制造;产生的过程;成功改进的手段;原料，材料;
v. “make”的现在分词;
🗣️ 情景例句
Richard, isn't that too much to ask of your mother?
Richard，那是不是太麻烦你母亲啦？
What on earth has happened to trouble you so?
到底发生什么事让您如此发愁？
This depends on the precise radio frequency of the 21-cm wavelength, or 1420 megacycles per second.
这种通讯联系要靠21厘米波段，即每秒1420兆周的精确无线电频率。