My poor memory also added to the difficulties when I decided to enlarge my vocabulary.
我的记忆力也加入到困难时，我决定扩大我的词汇量。
Towns and cities are also facing difficulties as ground water levels fall in the major north China plains, he added.
中国北方平原的城镇同时还面临地表水位下降的困难。
However, current added value tax doesn't function effectively and it also brings inflexible turnover of business fund some new difficulties.
而现行增值税制的运行不力，又给企业本不灵活的资金周转带来了新的障碍。
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