Abaculus
镶嵌用的小石[玻璃]砖, 嵌块
🗣️ 情景例句
A journey of a thousand miles begins with a single step.
千里之行，始于足下。
I'm going to call the employment agency for a job.
我将打电话给职业介绍所找一个工作。
Once the existence of this wave-length had been discovered,
一旦这种波长的实际存在被发现，