2018年08月11日
<#if article.previous?exists>上一篇 <#if article.next?exists>下一篇 freemarker.core.InvalidReferenceException: The following has evaluated to null or missing: ==> article.layout.pdfUrl [in template "12218" at line 11, column 60] ---- Tip: It's the step after the last dot that caused this error, not those before it. ---- Tip: If the failing expression is known to be legally refer to something that's null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)?? ---- ---- FTL stack trace ("~" means nesting-related): - Failed at: ${article.layout.pdfUrl} [in template "12218" at line 11, column 58] ---- -->

恐龙足迹

8月10日,由中、美、德三国专家组成的科研团队对外宣布,他们在中国贵州省发现了迄今中国最大规模的侏罗纪早期蜥脚类恐龙足迹群,该足迹群由蜥脚类恐龙在不同时段留下,对研究中国侏罗纪早期恐龙群的分布与演化有重要意义。

2018-08-11 5 5 株洲晚报 c1441135.html 2 恐龙足迹 /enpproperty-->