be ready beforehand是什么意思 be ready beforehand怎么读
be ready beforehand的用法和样例
用作介词 (prep.)
- He prepared his paper beforehand.
他事先准备好了论文。 - When a computer is used to solve a problem, a programme of instructions must be prepared in advance.
当用计算机解题时，必须事先准备好指令程序。
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