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
Looking around. Especially with a purchase of this kind.
到处看看， 特别是这一类买卖。
Did you watch the new office building being built?
你看过在建设中的新的办公楼吗？
And she's left about $4 million in her will to her husband's daughter by his first marriage.
而她在其遗嘱中将大约400万美元留给她丈夫第一次结婚所生的女儿。