以往建筑声学图解法，只能解决特殊位置反声板的声波反射问题。
The former graphic method applied in architectural acoustics can only solve the problem of the reflecting sound wave with the sound reflecting board in special positions.
介绍了聚氨酯材料的水声特性，并重点评述了聚氨酯水声吸声材料、水声透声材料和水声反声材料的研究进展。
The underwater acoustic properties of polyurethanes were introduced. The recent research progress of underwater acoustic materials of polyurethanes was reviewed.
显然是担心来自社会的越来越大的压力，上个月村声抨击反人口 贩 卖活动，称其对人口 贩 卖的严重程度夸大其辞。
Clearly worried about growing social pressure, the Voice attacked the antitrafficking campaign last month, charging that it has exaggerated the extent of the problem.
因为根据来自“SecureWorldFoundation”智囊团的布莱恩•维顿的说法，中国随后在2010年又进行了另一次反卫星实验，并且在没有任何批评声下获得了通过。
According to Brian Weeden, of a think-tank called the Secure World Foundation, China conducted another anti-satellite test in 2010, and that passed without criticism.
目前被动声探测距离精度还不能满足跟踪的需要，因此，反直升机智能雷对目标的跟踪问题归结为仅有角测量的跟踪问题。
Tracking target by using anti-helicopter mine (AHM) is actually the bearing-only measurement because precision of range detected by passive acoustic measurement cant satisfy the need of tracking.
目前被动声探测距离精度还不能满足跟踪的需要，因此，反直升机智能雷对目标的跟踪问题归结为仅有角测量的跟踪问题。
Tracking target by using anti-helicopter mine (AHM) is actually the bearing-only measurement because precision of range detected by passive acoustic measurement cant satisfy the need of tracking.
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