light on / upon

light on / upon偶然遇到;偶然发现：A palaeontologist lighted on a fish fossil on a mountain top，through study he concluded that this mountain was the bottom of a prehistorical ocean.一位古生物学家在一个山顶偶然发现一块鱼化石，经过研究他断定这个山是史前时期一个大洋的洋底。

• hold/catch/take the button
• north poles
• Adigranth
• helleri
• dosshouses
• key-to-tape system
• code ringing
• homeotherm
• fluid-bed processing
• disciplinest
• deerhorn antenna
• commercial
• Port Royal
• dragonizes
• analog multiplexer
• speed multiplier
• catch someone out
• rectifier filter
• sort through sth
• laryngotracheitis
• ageusia
• hammer drill
• ecumenicist
• as quick as a flash
• graphite fibre
• three years / five times etc running
• elastin
• equatorial easterlies
• line of balance
• battered woman / wife / husband / baby etc
• groaning board
• askaris
• flanches
• lacws
• leave no effects
• wreak havoc among
• pleomorphisms
• bided
• acceleratory reflex
• commanders
• whammer
• macaronics
• Soutine, Chaim
• keyers
• Medic
• countercyclical
• Humperdinck, Engelbert
• humble pie
• Skye, Isle of
• semantic generalization
• cutout
• go phut
• trophoblastic
• ASL
• Cyclopean
• knuckle under
• neurotic personality
• antisatellite
• 201 file
• conveyancings
• approach fix
• hold aloof
• boatswain bird
• watches of the night
• take someone down a buttonhole
• MLA
• Maxwell-Boltzmann distribution
• ephemeralness
• be mad about / for / on sb / sth
• rg.
• laminate
• auxiliary circle
• pariah
• Plutonic
• drying
• emulative
• loofas
• fatuitous
• authoritarians
• tomatoes
• Helmholtz coils
• cicerone
• calciphobes
• Nowakowskiella
• Anglomania
• milans
• leave ... aside
• synoptic meteorology
• dicarboxylic acids
• interactives
• Apocynaceae
• reduces
• wild vanillas
• aryls
• epicotyls
• pipe scale
• traffic engineer
• Calvados
• time-wasters
• precancerous