美 [bɪld daʊn]
逐步减少：指系统地逐渐减少，特别是核武器的数量，在每建造一个新的武器或弹头时摧毁多于一个。
降落
降低, 衰减 build down 净衰减 net attenuation; overall attenuation; residual attenuation ..
降落；衰减
On the Italian coast, colored houses build down the hillside, soaking up the sun as they face the sea.
在意大利的沿海地区，色彩斑斓的房子依山而建，它们朝面大海，沐浴着暖暖的阳光。
One solution is to build more accommodation on these public areas to cut down on travel time for work.
一个解决方案是在这些公共区域建造更多的住所，以减少工作通勤时间。
Years later, we decided to tear down our ugly house and build a beautiful one with a garden.
几年后，我们决定拆掉这个难看的房子，建一座带花园的漂亮房子。
There was a new effort to build wealth from the bottom up, rather than from the top down.
VOA : special.2011.03.24
One of them was that the U.S. Government had shut down the construction industry during the war, so they didn't build any houses for close to five years; obviously we had a shortage of housing.
其一就是美国政府在战争时期,停止了建筑行业,那时他们已经快五年没有建造任何房屋了,显然,房屋资源是短缺的
金融市场课程节选 : 耶鲁公开课
Peter's new fleet, we'll talk about his new fleet, which he oversaw and, in a very minor way, helped build himself, sails down the Don River in 1698 and takes the Turkish port of Azov, A-Z-O-V, on the Sea of Azov.
我们接下来讲讲彼得的新舰队,尽管影响不大,但他亲自监督,并且参与组建了这个舰队,舰队于1698年沿顿河顺流而下,直取土耳其的亚速港,在亚速海上
欧洲文明课程节选 : 耶鲁公开课
They cut down many trees to build the boats.
VOA : special.2009.02.11
People have not had a lot of money to tear down the old homes and build new ones.
VOA : standard.2010.03.15
In a conference call with investors this morning he announced the company was cutting spending on the new nuclear reactors he hopes to build down to a trickle.
Techniques to keeping the build cost down, reducing the time from factory to the shop floor (and on to customer) and working with suppliers to support the development of new technology in exchange for long term exclusives on the results, they have all played their part.
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"In this country, we love to build people up, tear them down and then build them back up again, " he says.