1·Without global targets and standards, all this may not be enough to head off climate change.
没有全球化的目标和标准，以上所有这些对于阻止气候变化来说可能都是不够的。
2·Outgassing is one of the "dangerous anthropogenic warming" effects that the Copenhagen summit is trying to head off.
出气是“危险的人为变暖”的后果之一，哥本哈根首脑会议将试图阻止。
3·But Perls hopes to head off commercial efforts to market this kind of test.
但帕尔希望努力阻止商业市场这种试验。
4·The High Commissioner says it is crucial to head off another humanitarian crisis.
这位高级专员说，这对阻止发生另一次人道危机是至关重要的。
5·The G7 nations sought to head off a collapse in global investor confidence, saying in a joint statement yesterday that they will take every action necessary to stabilize financial markets.
G 7成员国寻求阻止全球投资者的信心崩溃，昨日在一份联合声明中说，他们将采取一切必要行动，以稳定金融市场。