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difficulties「difficulties什么词性」
difficulties是什么意思 difficulties英 ['dɪfə,kʌltiz]美 ['dɪfə,kʌltɪz]n. 困难（difficulty的复数）；磨难difficulty是可数还是...
difficulties「difficulties的中文」
英语单词difficulties怎么造句 difficulties n. 难度;困难( difficulty的名词复数 );难事;麻烦1、 难题;难事 ...the difficulty of...