Preparative
a. 准备性的, 预备性的\\nn. 预备, 准备, 预备信号
🗣️ 情景例句
I'm the worst pupil in my party.
我是我的聚会中最坏的学生。
When you place a sheet of paper in a fax machine, the machine reads the writing on the page and changes the shapes of letters into electronic signals.
当你把一张纸放进传真机里,机器就会"读"纸上的字迹,把字的形状变为电子符号。
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