Anthraconite
黑方解石, 沥青灰岩
🗣️ 情景例句
Malcolm.
Malcolm。
Through his experiences during those six years.
在这六年中。
As the time and cost of making a chip drop to a few days and a few hundred dollars,
由于制造一块芯片的时间已缩短至几天，费用也只有几百美元，