The four species
加减乘除,四则运算
🧩 词语组成解析
the
[ðə]
art. 指已提到的人（物）;指说话人与听者已知的人（物）;用于独一无二的事物前;与形容词最高级和序数词连用;
four
[fɔr]
num. 四;四个;第四;
n. 四的;四个一组之物;
🗣️ 情景例句
She was still beautiful at the age of forty.
她活到四十岁仍然很美。
A contented mind is perpetual feast.
知足常乐。
They disregard social conventions without being conscious that they are doing anything extraordinary.
他们不顾社会习俗，意识不到自己所作所为有什么特殊之处。