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
mental
['mɛntl]
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
🗣️ 情景例句
Are you sure?
你确定？
I met one of the cameramen over at the television station.
我在电视公司遇到一位摄影师。
The man who manoeuvres carelessly into his five shillings worth of space ,at one of Europe's myriad permanent sites may find himself bumping a Bentley.
如果一位游客漫不经心地驾车驶入欧洲无数常年营地之一，花20镑租用一个空位，那么他可能会碰见一辆本特利汽车，