a chicken-and-egg situation, problem, etc.

a ˌchicken-and-ˈegg situation, problem, etc.a situation in which it is difficult to tell which one of two things was the cause of the other鸡与蛋孰先难定的情况；因果难定的问题

• spermist
• north germanics
• cragging
• skills
• leaf axil
• inoculating
• Nimitz, Chester William
• gamme
• Behring, Emil Adolf von
• small-talk
• hundred-and-eighty-degree
• Italianism
• enter on the scene
• buckhorns
• tragedian
• hot extrusion
• Bouguer-Lambert law
• ellipsograph
• rabblement
• soloistic
• light welterweight
• blastospheres
• Landwehr
• visceral cleft
• primary energy
• radiocast
• telepathy
• vicissitudinous
• mutual investment company
• crashproof
• toepiece
• scramble an egg
• thrust oneself in (或into)
• Chromaffin Systems
• Autolycus
• lumbodorsal fascia
• sengierite
• nonary
• fell low
• hot on sb's/sth's heels
• every (last) ounce of courage / energy / strength etc
• extrachance
• narcoterrorisms
• operator utilization
• pneumococcuss
• snappish
• lie before
• headwork
• humble plant
• join together
• cast up the gorge at
• shut sb up
• mazurkas
• bastite
• rooftop
• myeloblastosis
• table-dance
• syntonization
• key industry
• dufferdom
• as wise as Solon
• win through
• explant
• dynamic shift register
• be in dry dock
• solvated
• nullius juris
• rogue's tattoo
• barrenly
• rectilineally
• melting range
• balloonheaded
• vientianes
• bladder
• tectonophysicist
• wave drag
• anserine
• gowaned
• wolf's-foot
• alongships
• circinate venation
• any one
• ex lib
• palaeologuss
• phonier
• militaristic
• child bride
• acropetal
• cataphracts
• between the lights
• Coriolis parameter
• guard-book
• fleeting
• british empires
• bang valley
• admeasurement
• go south with something
• bounding mine
• AONB
• groper