记着按时还书 Remember also book on time
要按时还书 On time to return the ; Time book
按时还书
Return the books on time
以上为机器翻译结果，长、整句建议使用 人工翻译 。
借书者应按时还书。
Borrowers are expected to return books on time.
youdao
请您注意还书日期，按时还书。
Please return your book(s) in thirty(sixty) days.
千万不要相信他会按时还书。
Never credit him to return the book to you in time.
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