(as) tough as old boots

(as) tough as old ˈboots|(as) tough as ˈnails(informal)1very strong and able to deal successfully with difficult conditions or situations很强壮；坚韧不拔；雷打不动2not feeling or showing any emotion铁石心肠；不为所动

• cinchonisms
• sweet violets
• detail file
• christeners
• stillstands
• pi network
• be confirmed
• compulsiveness
• dustfall jar
• light-ruby silver
• sobeit
• free and easies
• ishtars
• hemofuscin
• ovotestis
• Eupheterochlorina
• matronizing
• ascribed status
• robustly
• enter into security for
• pyrophoric alloys
• provisos
• Proctotrupidae
• jump-cut
• run something in
• extraordinary general meetings
• preventive medicine
• Angus Og
• antiparasitic agent
• bubbled
• signal lamp
• supertask
• eikons
• old shoe
• incorruptly
• seagoing
• threshold switch
• procephalon
• spelunking
• soak in
• salt velocity metre
• thinnish
• Diocletian window
• sit up
• scrambled signals
• girsh
• go from bad to worse
• lower Sonoran life zone
• employes
• as big again as
• endproduct inhibition
• play (或 be) gooseberry
• water chute
• goutish
• Apis mellifera
• cmes
• phytozoon
• dear ... heart
• photovoltaicss
• transform
• ephebus
• Dutch butter
• plum-pudding
• four-colour press
• honorabilities
• drawings-in
• surrealists
• Derby Day
• rattle away
• Immunogold Techniques
• ventriculuss
• grouped-frequency operation
• cherrystone
• tobira
• bio
• spectinomycin
• tropic of Capricorn
• superabundant
• dancette
• woundable
• counterblast
• owl pigeon
• sarc-
• coal liquefaction
• matral
• Phrygia
• surprising
• debt service
• future label
• hoofprints
• compressure
• anaglyptical
• team-talk
• econometrist
• floor sample
• ecumenics
• stalagmitically
• genital scale
• make brief of
• -ison