回声

The reason why there is correlation between echolocation frequency and body size has been discussed.

探讨了影响回声定位声波的因素，并对频率与体型相关关系产生的机理做了分析。

They are one of the few mammals that can use sound to navigate, which is a trick called echolocation.

它们是极少数能用声音导航的哺乳动物之一，这种导航方式即所谓的回声''。

In general, echolocation calls are characterized by their frequency, intensity in decibels, and duration in milliseconds.

一般来说，用于回声定位的叫声是用它们的频率、强度以及持续时间来表示特征的。

The echolocation of bats is a major field in the research of bats.

蝙蝠回声定位的研究一直是国际上蝙蝠研究的重点和热点。

Echolocation is a highly technical and interesting .

回声定位是一项具有高度技术性和趣味性的手段。

Even so, we can hear echolocation clicks from some bats, such as the spotted bats.

即使这样，我们也能听到一些蝙蝠发出的回声定位声，比如斑纹蝙蝠。

They emit echolocation calls through these structures, which may serve to focus the sound.

它们通过这样的构造发出回声，可以用来聚集声音。

This paper applies discret wavelet transform to the analysis of echolocation calls of several bats.

本文的工作就是将两者结合在一起，为蝙蝠回声定位信号领域的研究提供一种新的、有效的方法。

We can find some new character of the echolocation calls of bat, and it is very important for search for new character of bats in animal ecology .

从分析结果中我们能够发现一些蝙蝠回声定位信号的新的特征信息，这对于进一步寻找蝙蝠新的生态学特征有着重要意义。

The scheme of the algorithm is shown in this paper, and the results of simulated data and echolocation signal from brown bat demonstrate the validity of the method proposed.

文中给出了实现该方法的具体步骤，并分别以仿真信号和蝙蝠回声定位信号为例验证了该算法的有效性。

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％。