置换积分法（换元积分法）

integration by substitution

• clash
• clasp
• class
• classic
• classical
• classicist
• classification
• classify
• classy
• clatter
• clause
• claustrophobia
• clavichord
• clavicle
• claw
• clay
• clean
• clean
• cleanly
• cleanly
• cleanse
• clear
• clear
• clear
• clearance