Additive identity
[计] 加性单位元素, 加法恒等元
🧩 词语组成解析
identity
[ai'dentiti]
n. 身份;[逻]同一性;个性;[数]恒等（式）;
🗣️ 情景例句
You'll see a dotted line on the last page.
你会在最后一页上看到一条虚线。
A pound of care will not pay an ounce of debt.
深忧偿不了小债。
That one is only 90 fen. That's cheap.
那支笔只有九毛钱，很便宜。