Homework submitted after that will not be graded but will be kept for reference.
迟于第二天交的作业将不被批改，但是留作参考。
We urge you to read all of the instructions thoroughly before attempting the installation or operation of this water heater. This manual should be kept for future reference.
我们要求用户在安装或使用本热水器之前，阅读本说明书的所有内容。请妥善保管本手册，以备将来参考。
Also, every letter communication has a record and can be kept for further reference when needed.
再者，每一份信件往来日后一旦需要，都有案可查。
The residue of the controlled drugs from the dispensing and administering of a registrant shall be destroyed by its manager and related people, and records kept for future reference.
领有管制药品登记证者调剂、使用后之残馀管制药品，应由其管制药品管理人会同有关人员销毁，并制作纪录备查。
The prescriptions must be kept for two years for reference.
处方应当留存两年备查。
The prescriptions must be kept for two years for reference.
处方应当留存两年备查。
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