1.Mybrotheris12yearsoldandheisinthesixthgrade.（我的弟弟12歲了，他正在上六年級(jí)。）2.Sarahcelebratedher12thbirthdaylastweek,andshe'sveryexcitedtobe12yearsold.（薩拉上周慶祝了她的12歲生日，她非常興奮自己已經(jīng)12歲了。）3.Toparticipateinthiscontest,youmustbeatleast12yearsold.（要參加這個(gè)比賽，你必須至少12歲。）當(dāng)然，讓我們繼續(xù)豐富文檔內(nèi)容。InaPersonalBiography:（在個(gè)人傳記中）AsIreflectonmyjourneysofar,Irealizethatat12yearsold,Ihadjuststartedtodiscovermypassionforwriting.（當(dāng)我回顧至今的旅程時(shí)，我意識(shí)到在我12歲的時(shí)候，我才剛開始發(fā)現(xiàn)我對(duì)寫作的熱情。）InaSchoolApplication:（在學(xué)校申請(qǐng)中）Theapplicant,abrightandenthusiasticstudent,iscurrently12yearsoldandeagertojointheschool'schessclub.（這位申請(qǐng)者，一個(gè)聰明且熱情的學(xué)生，目前12歲，渴望加入學(xué)校的國際象棋俱樂部。）InaStorySetting:（在故事設(shè)定中）Inthesmallvillage,everychildlookedforwardtotheir12thbirthday,asitmarkedthebeginningofnewresponsibilitiesandadventuresfora12yearsold.（在這個(gè)小村莊里，每個(gè)孩子都期待著自己的12歲生日，因?yàn)檫@對(duì)于一個(gè)12歲的孩子來說，標(biāo)志著新責(zé)任和冒險(xiǎn)的開始。）Remember,whenwritingorspeakingaboutage,it'simportanttouse"yearsold"toavoidanyconfusion,especiallyinformalsettings.Thephrase"12yearsold"isasimpleyetpowerfulwaytoconveyaperson'sstageoflifeintheEnglishlanguage.Certainly,let'sdelvedeeperintothedocument.InaParentTeacherConference:Discussingastudent'sprogress,ateachermightsay,"At12yearsold,manychildrenexperienceasignificantleapintheircognitiveabilities,andit'sclearthatJohnisnoexception."（在家長教師會(huì)議上，討論學(xué)生的進(jìn)步時(shí)，老師可能會(huì)說：“在12歲這個(gè)年齡段，許多孩子會(huì)在認(rèn)知能力上有一個(gè)顯著的飛躍，顯然約翰也不例外。”）DuringaMedicalConsultation:Apediatricianmightnote,"Fora12yearsold,it'scrucialtomaintainabalanceddietandregularphysicalactivitytosupporttheirgrowingbodies."（在醫(yī)療咨詢中，兒科醫(yī)生可能會(huì)指出：“對(duì)于一個(gè)12歲的孩子來說，保持均衡的飲食和定期的體育活動(dòng)對(duì)于支持他們成長中的身體至關(guān)重要。”）InaLegalContext:Whendraftingdocuments,alawyermightinclude,"Theminorinquestionis12yearsold,which,underthelaw,categorizesthemasachildrequiringspecialconsiderations."（在起草法律文件時(shí)，律師可能會(huì)包括：“所涉及的是一名12歲的未成年人，根據(jù)法律，這將其歸類為需要特別考慮的兒童。”）InaTravelBrochure:Whenhighlightingagespecificactivities,abrochuremightread,"Ouradventurecampisperfectfor12yearsolds,offeringablendofeducationandexcitementthatcaterstotheircuriousminds."（在旅游手冊(cè)中突出特定年齡段的活動(dòng)中，手冊(cè)可能會(huì)寫道：“我們的探險(xiǎn)營地對(duì)12歲的孩子來說再完美不過了，它提供了教育與刺激的完美結(jié)合，滿足他們好奇的心靈。”）Thephrase"12yearsold"isastapleinourlanguage,succinctlycapturingamilestone