是的，我们要确保食材的清洁和卫生。
最后还要经过刷、洗才能烹饪。[{'character': '最', 'pinyin': 'zuei4', 'highest pitch': 9.57, 'lowest pitch': 8.21, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '后', 'pinyin': 'hou4', 'highest pitch': 9.47, 'lowest pitch': 7.44, 'duration': 0.28, 'prosody hierarchy': '#2'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.12}, {'character': '还', 'pinyin': 'hai2', 'highest pitch': 9.89, 'lowest pitch': 7.13, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '要', 'pinyin': 'iao4', 'highest pitch': 10.58, 'lowest pitch': 8.98, 'duration': 0.13, 'prosody hierarchy': '#1'}, {'character': '经', 'pinyin': 'jing1', 'highest pitch': 9.25, 'lowest pitch': 8.34, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '过', 'pinyin': 'guo4', 'highest pitch': 9.23, 'lowest pitch': 7.96, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '刷', 'pinyin': 'shua1', 'highest pitch': 10.99, 'lowest pitch': 8.12, 'duration': 0.42, 'prosody hierarchy': '#2'}, {'character': '洗', 'pinyin': 'xi3', 'highest pitch': 11.24, 'lowest pitch': 4.21, 'duration': 0.43, 'prosody hierarchy': '#2'}, {'character': '才', 'pinyin': 'cai2', 'highest pitch': 6.79, 'lowest pitch': 6.27, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '能', 'pinyin': 'neng2', 'highest pitch': 7.43, 'lowest pitch': 6.26, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '烹', 'pinyin': 'peng1', 'highest pitch': 9.8, 'lowest pitch': 7.4, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '饪', 'pinyin': 'ren4', 'highest pitch': 10.17, 'lowest pitch': 6.57, 'duration': 0.24, 'prosody hierarchy': '#4'}]