talksatambassadoriallevel;大使级会谈
leadingcadresatalllevels;各级领导干部
repeattheyear'swork;staydown;留级
promotedtoahighergrade;升级
stonesteps石级
thecomparativedegree;比较级
thesuperlativedegree最高级
multistagerocket;多级火箭
aladderoftwentysteps;二十级的梯子
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〈量〉