Idemfactor
n. [數(shù)]冪等矩陣, 等冪矩陣
??? 情景例句
I need some help.
我需要幫助。
How do you do?
你好
He may hunt, beg, or stead occasionally to keep himself alive;
為了生存，他可能會去打獵、乞討，偶爾偷上一兩回；