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You're probably mostly objecting to the passive voice, which is a reasonable stand to take in scientific writing. He uses passive voice three times in these two sentences alone.

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Using "to be" isn't necessarily the passive voice. The author doesn't use the passive voice in those sentences.

http://writingcenter.unc.edu/handouts/passive-voice/

You're absolutely right, I misread those.

Passive voice would be "to be drawn", "to be read", etc.

Thank you.

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