logical：逻辑(上)的，符合逻辑的；合乎常理的

词根词缀： -log-推理 + -ical形容词词尾

• phot-
• photic
• photo
• photocell
• photochemical
• photochemistry
• photocopier
• photocopy
• photoelectric
• photogenic
• photograph
• photographer
• photographic
• photography
• photojournalism
• photometer
• photomontage
• photon
• photophobia
• photorealism
• photoreceptor
• photosensitive
• Photoshop
• photostat
• photosynthesis