There\\\'s a double threat out there that may help explain poor school performance, criminal behavior, alcoholism, and the growing numbers of Alzheimer\\\'s patients.
有一个双重威胁也许可以帮助解释恶劣的学校表现、犯罪行为、酒精中毒和阿尔茨海默氏症的患者的增加。
2
The first kind of behavior is a reaction to a potential threat, in which a predator isn't visible but there is good reason to worry that it might be nearby.
第一种是针对潜在威胁的行为：虽然未曾出现在视野中，但有充分的理由相信猫就在近处。
3
In contrast, she may as well reverse her behavior and immobilizes herself to protect her against any potential threat.