英语词汇proroactinium怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	proroactinium
释义	proroactinium protactiniumn. [化]镤（元素符号Pa，等于protoactini... protectionismn. 保护主义; 贸易保护制度 procrastinatorn. 拖延者；拖拉者；因循者 prorogationn. 休会 prerogativen. 权利,特权大主教法庭总督委任组成的法庭 procrastinatevi. 拖延,耽搁
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