Four operations
四则运算
🧩 词语组成解析
four
[fɔr]
num. 四;四个;第四;
n. 四的;四个一组之物;
n. 运作；运营；业务操作（operation的复数）
🗣️ 情景例句
and good-bye.
再见。
It never rains but it pours.
祸不单行。（不鸣则已，一鸣惊人。）
with the caption 'She was yet another victim, reduced to a screaming wreck '.
她是又一个受害者，成了只会尖叫的可怜虫。"