The US did begin to engage, but only to make more noise in the negotiations, dampening hopes for a US emissions reduction target.
美国确实开始参与行动了,但是他们只不过在谈判中引起更大的喧哗,因而降低了人们对美国提出减排目标的希望。
This will reduce the noise level on each page and make the useful content more prominent.
这将降低噪音水平,并让有用的内容在每一页上都更突出。
With a more aerodynamic shape and framed by a curved tail plane, these engines would make for a more streamlined aircraft, as well as directing most of their noise upward.
通过更加符合空气动力学的形状和一个曲线尾巴的飞机结构,这些发动机将使飞行更有效率,同时会将绝大部分的噪音传向空气上方。
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