add-substract key 中文意思是什麼
add-substract key
解釋
加減鍵-
This is a basic calculator ( add, substract, multiply, divide, square root ). the primary advantage is : the calculator is very easy to use you can operate just pressing one key
有最簡單的計算力(加減乘除及平方根) ,特色是非常易用,所有操作你只要按一個鍵就可以了。
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