阅读短文，判断正误。

      Hello,I'm Peter.  I'm from Canada.  I'm 11 years old.  I'm 1. 6 metres and 40 kilograms.  I like reading books.  Every morning, I go to school with my good friend Ben. We go to school on foot. Ben is 10 years old.  He's 2 kilograms heavier than me. But I'm 2 cm taller than him. We study in Red Wood School. Lucy is my sister. She's 1 year older than me. She likes drawing pictures. She is taller and stronger than me.

如图所示的匀强电场中，有a、b、c三点，ab=5cm，bc=12cm，其中ab沿电场方向，bc和电场方向成60°角，一个电荷量为q=4×10^﹣8C的正电荷从a移到b电场力做功为W₁=1.2×10^﹣6J求：

给下列加下划线的词语换一种说法，意思不变。

小胖墩儿跳起来，立刻退后两步。____