The reserve section of the library is due to close in one hour.

图书馆的储备区是预期要关闭1小时.
due to 有预期的意思,具体解释如下：
due
/ djuː; US duː; du/ adj
[pred 作表语]
(a) (to sb) owed as a debt or an obligation 应支付; 应给予; 欠下:Have they been paid the money due to them?他们是否已得到了应得的钱?* I'm still due fifteen days' holiday.我还应有十五天假期.
(b) for sth owed sth; deserving sth 应有; 应得到:She's due for promotion soon.她不久就要晋升了.
[pred 作表语] requiring immediate payment 须立即支付; 到期:fall/become due 到期 * My rent isn't due till Wednesday.我的租金星期三才到期.
[pred 作表语] (to do sth) scheduled; arranged; expected 预定; 约定; 预期:His book is due to be published in October.他的书预定十月份出版.* The train is due (in) (ie scheduled to arrive) in five minutes.火车预定在5分钟后到达.
[attrib 作定语] suitable; right; proper 适当的; 正当的; 适宜的:after due consideration 经适当考虑之后 * With all due respect,I disagree completely.不揣冒昧,实不敢苟同.
to sth/sb caused by sb/sth; because of sb/sth 由某人[某事物]引起的; 由於某人[某事物]:The team's success was largely due to her efforts.该队的成功在很大程度上是由於她的努力.