Lose momentum and your forward thrust will be curtailed. If you ingest the animosity and acrimonious threats of the nay sayers you will be discouraged, and indeed that is their controlling motive.
如果你接受那些充满敌意或尖刻威胁之谔谔之士的话，你将会丧失勇气，而让他们控制的动机得逞。
2
Do they show an understandable defensiveness on the part of leading scientists faced with ill-informed challenges from climate change nay-sayers, or something more worrying?