这份综述说，随着被感染的动物掉队死亡，迁徙可能减少疾病数量，但是迁徙的变化可能阻止这种天然的防止感染的措施。
Migration could reduce the amount of disease as infected animals are left behind to die, but changes in migration might prevent such natural purging of infections, the review says.
唯一永恒不变的是“不断变化着的变化、转变”；所有的事物天然地倾向于和谐。 大自然试图达到一个更稳定的状态，而不是互相恐吓、排挤。
(Sa’ke’j:) The only constant is change–constant change, transformations; everything naturally friendly, trying to reach a more stable state instead of bullying each other around.
然而，最重要的是，油气专业公司转向天然气是对需求和气候变化政策下赌注 。
Most of all, however, the majors’ dash for gas is a bet on demand and climate-change policy.
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