[intransitive] to try very hard to do sth difficult or to deal with a difficult problem
努力做（困难的事）；处理（难题）◆He was still labouring away over some papers in his office.
他仍然在办公室里努力处理一些文件。◆The group is labouring under €5 bn of debt.
这集团正为 50 亿欧元的债务艰辛挣扎。