を記入
function newMark(y,m,d)
{ oldDay = new Date(y+"/"+m+"/"+d);
newDay = new Date();
n = (newDay - oldDay)/(1000*60*60*24);
if(n <= 14)document.write("
");}
//-->
| 単語 / 【 ID 】
意味 / 例文 /同義語/上位語/下位語/派生語 |
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carbon dating
![]() SimpleWikiWiktionaryGoogle検索CollinsCambridgeLongmanLongman英和Learners 【 25142 】 【意味】 "[名詞] a chemical analysis used to determine the age of organic materials based on their content of the radioisotope carbon-14; believed to be reliable up to 40,000 years [例] Carbon dating is used to determine the age of organic materials. [例] They used carbon dating to determine the age of the fossil. [意味] 放射性炭素年代測定, 放射性炭素年代測定法, 炭素14年代測定, 炭素年代測定, 炭素年代測定法, 炭素一四法 ; [同義語] radiocarbon dating, carbon-14 dating ; [上位語] dating, geological dating ; [同義語群] 00992732-n" |