Limitations on sentence structure are also quite minimal. The most difficult aspect of learning Japanese is the mastery of the reading and writing of kanji.
句子结构的限制也很少，最难的方面可能是读写日本汉字。
Results Serious problems exist in their mastery of knowledge as well as implementing in the aspect of Standard Prphylaxis.
结果：他们的标准预防知识掌握、防护措施实施等方面存在严重问题。
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