Mental arithmetic
n. 心算
📖 牛津释义
mental arithmetic
calculation(s) done in the mind, without writing down figures or using a calculator, etc 心算.
🧩 词语组成解析
adj. 内心的,精神的,思想的,心理的;智慧的,智[脑]力的;〈口〉精神病的,意志薄弱的,愚笨的;
n. 精神病患者;
ment思考,神智+al表形容词 → 智力的;精神的
n. 算术,计算;算法;
arith数学+met+ic...术 →算术
🗣️ 情景例句
I was relieved of my position.
我被撤职了。
Did the film live up to your expectations?
这部电影达到你期望的标准了吗?
If they are not brought to the surface soon they may lose their lives.
如果不把他们尽快救到地面上来,他们就有可能丧生。
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