法律术语：Contract1.Acontractcannotariseoutofanillegalact.违法行为不能构成合约。2.Acontractisestablishedwhentheacceptancebecomeseffective.承诺生效即合同成立。3.Acontractmaybemodifiedifthepartiesreachaconsensusthroughconsultation.当事人协商一致即可以变更合同。4.Apersonisnotliablefordebtscontractedduringhisminority.一个人无须对他在未成年时期的合同债务承担责任。5.Atransactionbetweentwopartiesoughtnottooperatetothedisadvantageofathird.合约不约束第三人。6.Anacceptanceoncegivencannotberevokedunlesstheofferorconsents.除非要约人同意，承诺一经做出即不得撤回。7.Anacceptanceisastatementmadebytheoffereeindicatingassenttoanoffer.承诺是受要约人同意要约的意思表示。8.Anofferormaywithdrawanofferatanytimebeforeithasbeenaccepted.在要约被受要约人接受往常，要约人可以随时撤回要约。9.AnyamendmenttothiscontractshallbecomeeffectiveonlybyawrittenagreementbyPatryAandPartyB.对本合同的任何修正，只有经甲、乙双方签署书面协议后方能生效。10.Anyannexistheintegralpartofthiscontract.本合同一切附件均为本合同的有效组成部分。11.Anydeparturefromthetermsandconditionsofthecontractmustbeadvisedinwriting.任何与合同条款相背离的地点，都应以书面方式通知。12.Anyfailurebyapartytocarryoutallorpartofhisobligationsunderthecontractshallbeconsideredasasubstantialbreach.一方当事人不履行本合同的全总或任何部分义务均应被视为是根本违约。13.Anypartyhasnorighttoterminatethiscontractwithoutanotherparty’sagreement.未经另一方当事人同意，任何当事人均无权终止合同。14.Anyviolationofdeadlinescontainedinthecontractwillequatetobreachofcontract.凡违犯合同规定的任何期限都等同违约。15.Contractlawisinitiallyconcernedwithdeterminingwhatpromisesthelawwillenforceorrecognizeascreatinglegalrights.合同法首先涉及确认哪些许诺可以作为创设的法律权利而由法律强迫施行或承认。16.Examplesofvoidcontractsarethoseenteredintoasaresultofmisrepresentation,duressorundueinfluence.因欺诈、胁迫和乘人之危而签订的合同属于可撤销合同。17.Heisincompetenttosignthecontract.他没有签署合同的行为才能。18.Hereasonablybelievesthattherewillbeafundamentalnon-performanceofthecontractbytheotherparty.他有理由认为对方当事人将会不履行合同以致根本违约。19.Hesignedacovenantagainstunderlettingthepremises.他签署了一个反对廉价出租屋的契约。20.Hewasincapableoffulfillingthetermsofthecontract.他没有才能履行合同条款。21.Ifacontractbecomesinvalid,thevalidityofitsindependentlyexistingclausespertainingtothesettle