相比较而言火山爆发对于天气和气候这类长期项目的影响就不是这样的明显。

Less obvious are the impacts of volcanoes in the long-term on other features of our lives such as weather and climate.

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所有项目不仅提供紧急援助，还帮助各国制定病虫害治理战略，以防止中长期内进一步爆发森林病虫害。

All projects offer more than emergency assistance, helping countries also to develop pest management strategies to prevent further outbreaks in the medium and long term.

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这次的冰岛火山爆发是不是对旅客的行程造成更长期限的影响还不能确定。

It is also uncertain whether the recent Icelandic volcanic eruptions will have a longer term impact on passenger travel plans.

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