通过室内水槽试验，描述了波浪作用下细颗粒泥沙的起动现象。
The threshold phenomenon of fine sediment under wave action is described based on a flume experiment.
同时还发现当不起动现象发生时，由于波后分离包的存在，在进气道的进口前形成向后倾斜的激波而不是正激波。
When the inlet unstarted, there is a inclined backward shock in the front of the inlet due to the existence of separation bubble behind the shock near the wall.
介绍汽车起动用蓄电池爬酸的现象和形成机理，从使用角度分析爬酸形成原因，并提出预防和维护措施。
The author introduces the acid leakage of starting battery and its forming causes and proposes the preventing and maintenance measures.
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