回声

Dolphin echolocation is on target to judge the proximity and direction, location, shape and even the nature of objects.

海豚是靠回声定位来判断目标的远近、方向、位置、形状、甚至物体的性质。

Their eyes are not well formed so they rely on echolocation to navigate and search for food in the muddy river bottom.

他们的眼睛形成不好，因此他们在昏暗的河流底部依赖回声定位进行导航和搜寻食物。

Methods of echolocation, pontoon and surveying level by down hole gauge are introduced.

简要介绍了目前常用的回声法、浮筒法和井下压力计探测法探测液面的方法，总结了各自的优缺点和适用范围。

Presently the way of study the echolocation calls of bat is localizated in traditional Fourier analysis.

目前对蝙蝠回声定位信号的研究方法主要局限于传统的傅立叶分析。

The technique is call echolocation, and many species, most notably bats and dolphins, use it to get around.

这个技术被称做回声定位，许多生物，特别是蝙蝠和海豚，就是利用它来四处行动。

There are 117 species of chiropters belonging to 31 genera, 7 families inChina. Their particular echolocation attracts many researchers focus and interesting.

蝙蝠在中国的种类丰富，共有7科31属117种，其特殊的回声定位功能引起了许多学者的兴趣。

DWT is testified to be a new effective way in analyzing the echolocation signals of bats.

因此，小波分析是分析蝙蝠回声定位叫声的一种有效的新途径，有其广泛的应用价值。

The bat fossil can tell researchers about the evolutionary history of echolocation and the evolution of life in the early Tertiary.

研究者们从蝙蝠的化石中获悉回声定位的进化历史和第三纪早期的生物生活。

Dolphin's vision is almost zero, to rely on echolocation to understand environmental changes in biology, physiology and bionics, and so on a wide range of scientific research value.

白鳍豚的视力几乎为零，依靠回声定位了解环境变化的情况，在生物学、仿生学和生理学等方面具有广泛的科研价值。

In addition to using Wu echolocation, the voice delivered by dolphin also uses the contact of the Wu mutual.

海豚所发的声音除用於回声定位外，还用於相互间的联系。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。