Focuser
聚焦放大镜, 聚焦装置
🗣️ 情景例句
Genes are the very building blocks of life.
基因是生命最基本的构建者。
Hi, Lucy. I'll take French and Economics.
你好，露西，我想选法语和经济。
Until we are intelligent as to its laws and varieties,
直到我们理解了风俗的规律性和多样性，