原因一定很多，就随你吧！
研究表明，一定的节奏和押韵可以让记东西更简单，这也是为什么许多小孩子会阅读之前就能记忆很多书籍内容的原因。
Studies have found that rhyming and the rhythm that goes along with it makes it easier to remember things-which is why toddler's can memorize some books before they can read them.
虽然取得了一定的成效，但疟疾在很多地方又卷土重来，部分原因就是出现了具有抗药性的疟原虫，比如抵抗传统疟疾治疗药物氯喹的疟原虫。
After limited success, the disease rebounded in many places, due in part to the emergence of parasites that resisted drugs such as chloroquine that had previously held the malady at bay.
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