calculation by time step的用法和樣例：
例句
- Constant expressions, whose operands are all simple type constants, are evaluated at compilation time.
編譯時(shí)計算操作數均為簡(jiǎn)單類(lèi)型常數的常數表達式。 - The values in the new column are the values that were computed at the time the statement was executed.
新列中的值是在執行該語(yǔ)句時(shí)計算出的值。
