必要时，更在书本上做记号，用彩色笔加上五颜六色，甚至在本子上另做笔记，以备日后参考。

Whenever necessary, I would do some marking in the book, using colour pens and even taking down notes in a separate exercise book for future reference.

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在一片年青的红衫树林里，一只被加上了记号的北方斑点猫头鹰正朝研究人员的诱饵猛扑过来。

A tagged northern spotted owl swoops toward a researcher's lure in a young redwood forest.

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