exposure：显露，暴晒；揭露，曝光；受到...影响 

词根词缀：ex-向外 + -pos-放置 + -ure

• spectrum
• speculate
• speculation
• speculative
• speculator
• speculum
• speech
• speechify
• speechless
• speed
• speedometer
• speedster
• speedwell
• speedy
• speleologist
• speleology
• spell
• spellbind
• spellbound
• spellchecker
• spelunk
• spelunker
• spelunking
• spend
• spending