菲奥纳，好音讯是，本人们都能够做本人们的部份来维护水源以简单的办法和步调就能够相对轻易而没有痛苦悲伤了。

Fiona, the good news is that we can all do our part to conserve water by taking simple measures and such steps can be relatively easy and pain-free.

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本部份包括授课与复习的主题、与相对应的指定题目。指定阅读的说明列于时间表下方。

This section contains lecture and recitation topics, along with corresponding assignments. The legend for the reading assignments is listed below the calendar.

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