Arithmetic (名詞)是「算術」的意思,有時會簡單的指加減乘除。 → I learned mental arithmetic when I was in junior high school. It's actually ... ... <看更多>
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Arithmetic (名詞)是「算術」的意思,有時會簡單的指加減乘除。 → I learned mental arithmetic when I was in junior high school. It's actually ... ... <看更多>