随着干热胁迫的加深，供试树种蒸腾速率的变化可分为增强型、减弱型及稳定型3种；
With intensified drought and heat stress, 3 patterns of change, enhanced, weakened and stable, were found of the transpiration rates.
该组织称尽管高昂的商品价格，尤其是高油价会威胁经济回升，但是人们关于“双底”型衰退的担忧有所减弱。
The fund said that concerns were fading over a “double-dip” recession, though the recovery could be threatened by higher commodity prices, especially oil.
美国国家航空航天总署用一架改良型喷气战斗机进行了测试，结果表明特殊的机身形状可以减弱音爆。
Tests by NASA with a modified fighter jet have shown that novel airframe shapes can reduce the boom.
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