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- Some bats have specialized structures for emitting echolocation calls. 一些蝙蝠已经把用于发出回声定位叫声的结构专门化了。
- In terms of pitch, bats produce echolocation calls with both constant frequencies and varying frequencies that are frequently modulated. 关于音调，蝙蝠用恒定频率和频繁调整的变化频率发出回声定位的叫声。
- In general,echolocation calls are characterized by their frequency,intensity in decibels (dB),and duration in milliseconds (ms) . 一般来说，用于回声定位的叫声是用它们的频率、强度(分贝)以及持续时间(毫秒)来表示特征的。
- Echolocation calls are usually ultrasonic ranging in frequency from 20 to 200 kilohertz (kHz),whereas human hearing normally tops out at around 20 kHz. 用于回声定位的叫声一般是20－200千赫之间的超声波，而人所能听到的最高频率在20千赫左右。
- In general, echolocation calls are characterized by their frequency, intensity in decibels (dB), and duration in milliseconds (ms). 一般来说,用于回声定位的叫声是用它们的频率、强度(分贝)以及持续时间(毫秒)来表示特征的。
- In general, echolocation calls are characterized by their frequency, intensity in decibels (dB), and duration in milliseconds (ms) . 一般来说，用于回声定位的叫声是用它们的频率、强度（分贝）以及持续时间（毫秒）来表示特征的。
- The identification method of the echolocation calls from four species of Rhinolophus in flight was studied based on the wavelet packet decomposition. 研究了飞行状态下的四种菊头蝠回声定位声波的识别方法。
- We studied the echolocation calls and acoustic response properties in the inferior colliculus of the least horseshoe bat Rhinolophus pusillus. 研究了菲菊头蝠自由飞行状态下的回声定位信号和下丘神经元的声反应特性。
- H. armiger emits constant frequency/frequency modulated (CF/FM) echolocation calls with relatively longer call duration. 由于台湾叶鼻蝠的回声定位叫声为常频/调频型，回声定位叫声时间也较其他只使用调频型叫声的物种来得长，因此本研究检验的假说分为以下两部份：（1）与频率有关的避免干扰反应假说：当两只个体回声定位叫声中，常频型讯号的频率，也就是峰值频率的差异很小时，应该会出现避免干扰反应；
- Echolocation calls are usually ultrasonic ranging in frequency from 20 to 200 kilohertz (kHz), whereas human hearing normally tops out at around 20 kHz. 用于回声定位的叫声一般是20－200千赫之间的超声波，而人所能听到的最高频率在20千赫左右。
- H. armiger also increased differences in minimum frequency and bandwidth, and emitted echolocation calls with higher minimum frequency and wider bandwidth when they flew in pairs. 在调频型讯号的部份，成对飞行的个体则会增加最低频率或频宽的差异，同时使用较高的最低频率及较宽的频宽。
- These sounds are generally emitted through the mouth, but Horseshoe and leaf-nosed bats emit their echolocation calls through their nostrils, there they have basal fleshy horseshoe or leaf-like structures that are well adapted to function as megaphones. 这些声音一般通过口发出，但具有马蹄铁形和叶形鼻于的蝙蝠则通过鼻孔发出它们的回声定位叫声，在那里它们具有非常适合放大器功能的基本的肉质马蹄铁或叶状结构。
- These sounds are generally emitted through the mouth,but Horseshoe and leaf-nosed bats emit their echolocation calls through their nostrils,there they have basal fleshy horseshoe or leaf-like structures that are well adapted to function as megaphones. 这些声音一般通过口发出，但具有马蹄铁形和叶形鼻于的蝙蝠则通过鼻孔发出它们的回声定位叫声，在那里它们具有非常适合放大器功能的基本的肉质马蹄铁或叶状结构。
- Furthermore, there would be some JAR in the FM part of H. armiger’s echolocation calls (2) JAR in duration: species emit CF/FM echolocation calls would also shorten duration when flying in pair. （2）与叫声时间有关的避免干扰反应假说：常频/调频型蝙蝠会藉由缩短叫声时间，以减少同种出现时造成的干扰。
- ECHOLOCATION CALLS OF GREATER HORSESHOE BAT AT DIFFERENT BEHAVIOR 马铁菊头蝠不同行为下的回声定位叫声
- My brother is always at my father's beck and call. 我兄弟总是对我父亲唯命是从。
- Donna call on her friend kita for a chat. 多娜到她的朋友莉塔家闲谈。
- Forgive me so early to call up you please. 请原谅我这么早给你打电话。
- The smell of the flowers calls up my childhood. 这些花香使我回忆起了我的孩提时代。
- That's all there is to make a speed dial call. 在那里全部要进行快速拨号呼叫。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
