achromatic len

• 消色差透镜

achromatic len的用法和样例：

例句

1. The exact date of the first achromatic doublet's creation is not known, nor is the name of the person who first accomplished the task.
   第一片消色差透镜确实的发明日期并不清楚，也不清楚第一位发明人是谁。