A closed book

<p style="line-height:30px;hyphens:auto;color:#333333;text-align:justify;font-size:16px;font-family:Helvetica,Arial,sans-serif;font-weight:normal;" data-flag="normal">a closed book完全不了解，搞不懂</p><p style="line-height:30px;hyphens:auto;color:#333333;text-align:justify;font-size:16px;font-family:Helvetica,Arial,sans-serif;font-weight:normal;" data-flag="normal">closed adj. 关闭的；合上的</p><span><br /></span><p style="line-height:30px;hyphens:auto;color:#333333;text-align:justify;font-size:16px;font-family:Helvetica,Arial,sans-serif;font-weight:normal;" data-flag="normal">与an open book意思相反</p><span><br /></span><p style="line-height:30px;hyphens:auto;color:#333333;text-align:justify;font-size:16px;font-family:Helvetica,Arial,sans-serif;font-weight:normal;" data-flag="normal">He issuch a closed book, he never talks about himself.他这人很封闭，从来不谈论他自己。</p><span><br /></span><p style="line-height:30px;hyphens:auto;color:#333333;text-align:justify;font-size:16px;font-family:Helvetica,Arial,sans-serif;font...