Pharosage
光通量密度, 照度
🗣️ 情景例句
so that the people of our town
好让我们镇上的人
It is dogged (that) does it.
天下无难事，只怕有心人。
In a few days I was learning and enjoying it like any child.
几天之后，我像一个孩子那样学习起来--而且学得很开心。