Optical efficiency
[电] 光效率
🧩 词语组成解析
🗣️ 情景例句
You need to pay more attention to it.
你需要更加留心。
Is the production line fully attomatic?
生产线是全自动的吗？
I was only five when my father had taken me abroad, and that we eighteen years ago.
我5岁那年，父亲就带我出了国，那是18年前的事了。