Luminous efficiency
[化] 光视效率; 光视效能
🧩 词语组成解析
🗣️ 情景例句
I remember your parents' first house very well.
我还清楚记得你父母的第一栋房子。
You cannot make a silk purse out of a sow's ear.
猪耳朵做不成丝钱包；巧妇难为无米之炊。
Not that long ago!I'm not more than twenty-nine myself.
不，没有那么久。我自己现在还没29岁呢。