get down to开始: begin; start; initiate; comm ...认真: conscientious; earnest; seri ...处理: deal or cope with着手: put one's hand to; set about做: make; manufacture; produce下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:开始认真处理，着手做，即可在微信中查询翻译
