它是一种作者与读者以日志风格进行交互的中介。
It's a medium in which an author writes a journal-style Web site with provisions for readers to respond.
读者可能对在大多数一年级化学书中介绍的图形与这些MO的关系感到惊奇。
The reader may be wondering about the relation of these MO's to the picture presented in most freshman-chemistry books.
书中介绍了雪是什么，以及雪的用途。同时，作者还教小读者如何用纸制作雪花。
Explains what snow is and what can be done with it. Includes instructions for making a snowflake from paper.
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