200个一定要学的英文词根词缀200个一定要学的英文词根词缀Part 1 100个一定要学的英文词根1. 2. 3. 4. 5.1.act词根考古学：意为to do, to drive，表示“做；使”词汇：counteract, overact, radioactive, activate, active, actuate, transact, reactionary词缀：counter-（反对）...