反

• Much good may it do you !
  （反意语）这对你好处多着呢！
• She was caught up in the movement .
  她投身于反核运动。
• The advancing troops recoiled before the counter-attack .
  前进部队遭遇反攻而退却。
• The proof is easy, but the counterexamples are hard .
  证明是容易的，但反例则甚难。
• His cheerfulness had been replaced by a frown .
  他一反笑容可掬的常态，蹙起了眉头。
• His explanation only made me feel more puzzled than ever .
  他这一说反把我弄糊涂了。
• The usual counter-ions are sodium, potassium and ammonium .
  反离子通常是钠，钾和铵。
• His hands were bound behind him .
  他的手被反捆起来。
• The positron is an antielectron .
  正电子就是反电子。
• This operation is called inversion and is symbolized i .
  这个操作叫倒反，用符号i表示。