遍地黄沙的荒漠，干涸的河床与湖床中的沉积物——在伊拉克，这些沙尘源地的存在，为沙尘暴的发展壮大提供了极佳的条件。
Sandy deserts, impermanent lakes, and riverbed sediments provide plentiful material for dust storms in Iraq.
介绍国内外几种主要的循环流化床煤气化方法、流程和煤气化技术发展趋势。
This paper presents some major processes and developing trend of circulating fluidized bed coal gasification at home and abroad.
根据国内家居设计的发展趋势，考虑到居室空间的合理利用，设计了一款折叠睡床。
According to the development trend of domestic home design, considering the reasonable use of room space, a folding doss is designed.
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