突变 abrupt change ; [科技] abrupt change ; Abrupt climate change
气候突变 abrupt change ; abrupt change of climate ; climatic abrupt change ; climate abrupt change
急剧[突然]变化 Abrupt change
突然变化 abrupt change
突变（又作质变） catastrophe (theory); qualitative change; change in quality; abrupt change; mutation
方向突变 abrupt change in direction
质地突变 [土壤] abrupt textural change
[土壤]质地突变 abrupt textural change
突变检验 abrupt change test method
人类造成的突变(以地质时期为尺度衡量)，其证据触目惊心。
Evidence of abrupt change — on a geological time scale — wrought by human hands would seem to be overwhelming.
而这份美国的研究报告涉及了有关气候突变的四个方面的内容，其中的两个方面都透漏出了坏消息。
The US report considers four scenarios for abrupt change, and delivers bad news on two.
气候突变在过去从未发生过。
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