What you need to prepare is a few drop of vinegar and eyedrop bottle.
你需要准备的就是几滴醋和一个点眼药器。
If you are absent that day it is your responsibility to make sure you are aware of what you need to prepare.
如当日缺席，学生须自己负责了解需要准备的内容。
If you are absent that day it is your responsibility to make sure you are aware of what you need to prepare.
如当日缺席，学生须自己负责了解需要准备的内容。
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