稀疏压缩

cracked compression───破裂压缩

reactive depression───反应性抑郁症；反应性抑郁

crankcase compression───曲轴压缩

make an impression───让人眼前一亮；给人留下…的印象

process gas compression───工艺气体压缩

reactive depressions───反应性抑郁症；反应性抑郁

chest compression───胸外按压

conditioned suppression───条件抑制

reading comprehension───阅读理解；阅读测验

After discussing the conditions under which this approximation could be used, it is applied to study various 1-dimensional flows: continuous flows, rarefaction, compression waves and shock waves.───在讨论了这种近似的适用条件后，分别用它就一维流的情况研究了连续流、稀疏波和压缩波以及激波等运动形态。

Dam-break flood waves often vary rapidly or even discontinuously, with both rapid and tranquil flow behaviors, as well as both compression and rarefaction waves.───溃坝洪水波通常为迅变或间断流动，同时兼有急流和缓流、压缩波和稀疏波等流态。