Day21-Review
1
luminance
n.（名词）
Thecondition or quality of being luminous.
发光：能发光的状态或特征
2
You need to research, you need to be
informed, you need to figure out the pattern and the meaning, you need to form
coherent arguments and you need to come up with the right words for all that.
排比句，写作中可以灵活运用。
3
supersede
v.tr.（及物动词）
To take the place of;replace.
取代；代替
The use of robots will someday supersede
manual labor.
4
Writing is exactly the ballet for our mind.
