翻譯:將下列英文文字譯為中文(Translate the following sentences into Chinese.)
1. Public opinion in affluent countries often attributes extreme poverty to faults with the
poor themselves — or at least with their governments. Race was once thought the
deciding factor. Then it was culture: religious divisions and taboos, caste systems, a
lack of entrepreneurship, gender inequities.(15 分)
2. A radio wave can suffer multipath distortion by reflecting off walls and building
structures, furniture, equipment or other objects in the near environs. Signals may
then follow multiple paths from transmitter to receiver, which causes numerous copies
of the same transmission to arrive at the receiver.(15 分)
3. As mammals arose from their reptile forebears, their reproductive strategy shifted
from drop-the-eggs-and-flee to defend-the-nest, and the selective advantages of the
latter approach may have favored the emergence of hormonal brain changes and the
resulting beneficial behaviors.(15 分)