These trade talks are a critical test for the challenge of striking a global deal on climate change.
这些贸易谈判是对能否在气候变化问题上达成全球性协议的挑战的一个关键考验。
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Plan releases around immovable dates, like vacations, trade fairs and other important events, so that you can be present at critical phases in the project.
One key finding in the study is that it is not the warming of the ocean alone that reduces cloudiness -- a weakening of the trade winds also appears to play a critical role.