This is no time to wallow in negativity.
不要浪费时间让自己沉浸在消极情绪中了。
2.put bluntly 坦率地说,坦白说
Put bluntly, we are headed for about another 0.5c of warming whatever we do.
坦白说,不管我们现在做什么,温度都将再升高0.5度。