Experts say the world has already passed the safe level of carbon dioxide in the atmosphere for coral reefs, and even the most ambitious carbon cuts planned for coming decades will fail to save them.

专家说，对珊瑚礁来说，全球大气二氧化碳浓度已经超过了安全浓度，即使最有雄心的未来十年碳减排计划挽救不了它们。

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They create safe places or dangerous ones — in my home, thanks to my parents' rules, the overwhelming atmosphere is one of harmony.

他能创造安全或危险的环境——在我家，感谢父母的教导原则，家庭气氛还算合谐。

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But we also recognize that it is necessary to provide safe and transparent methods of voting and an atmosphere for voting.

但是，我们也注意到，必须提供安全和透明的选举方式和投票环境。

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But the ICC's Ray Mali said Pakistan has a "safe and secure atmosphere", adding: "At the moment, we see no reason for teams not to play here".

BBC: Champions Trophy gets all-clear

One would have thought that the safe distance between journalists and fighter may have provoked more aggressive lines of questioning but the atmosphere remained convivial.

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