They textbook contains more explanatory material than models and is therefore hard to plough through.

这本教科书中说说明性材料多于范文，所以难以阅读。

youdao

This morning, Clearwire filed an update on the situation with the SEC, and followed up with a press release with some explanatory material.

FORBES: Clearwire Shares Inch Higher; Dish Bid Not Quite Dead Yet

Users can discuss the latest material, read and write explanatory articles on leaks along with background material and context.

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