Quartzitic
a. 石英岩的, 由石英质组成的
🗣️ 情景例句
Remembering the past was his only ple4asure.
回忆往事是他唯一的乐趣。
Never too old (or late) to learn.
学到老，学不了。
namely 6 million million miles.) Radio waves also travel at the speed of light,
即6万亿英里）。无线电波也是以光速传播的。