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Echolocation calls are usually ultrasonic ranging in frequency from 20 to 200 kilohertz Hz , whereas human hearing normally tops out at around 20 Hz .

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。

The study population consisted of 21 males and 9 females ranging in age from 1 month to 76 yeas.

其中有21位男性，9位女性，年龄分从1个月76岁。

Tapeworms can survive and thrive indefinitely inside the human body, ranging in length from 1/250 of an inch to an incredible 30 feet!

绦虫在人体内生长，长短并不固定，短的只有1/250英寸（约0.1毫米），长的能达到令人难以置信的30英尺（约9米）！

American Paddlefish Caviar - Paddlefish, often called "Spoonbills," are a cousin to sturgeons and yield roe ranging in color from pale through dark steel-grey and golden "osetra brown".

美国白鲟鱼子酱。白鲟又称&匙吻鲟&，是美国鲟鱼的近亲。其鱼籽颜色有灰白色，黑金属灰的颜色以及金棕色。

Old German breed of sturdy black or grayish wire-haired terriers having a blunt muzzle ranging in size from fairly small to very large; used as ratters and guard dogs or police dogs.

古老的德国品种，强健的黑色或灰色硬毛猎犬，口部不尖，体型从很小到非常大；用作捕鼠犬、看门狗或警犬。

Old German br d of sturdy black or grayish wire-haired terriers having a blunt muzzle ranging in size from fairly small to very large; used as ratters and guard dogs or police dogs.

古老的德国品种，强健的黑色或灰色硬毛猎犬，口部不尖，体型从很小到非常大；用作捕鼠犬、看门狗或警犬。

Modern and practical astronomy was developed in the 18th century, and successively from the theoretical and practical solution to the Sino-satellite instrument measuring time, too Seoul Scott multi-satellite measurements such as latitude, as well as simultaneous determination of longitude and latitude Supreme Court means the emergence of theodolite, contour instrument, the satellite instrument, zenith instrument, photographic zenith tube, sextant and other useful astronomical instruments, the most commonly used is the optical theodolite .20 century, all-round practical field of astronomy 60 years after the emergence of new technologies, such as satellite Dhoop Le observation and satellite laser ranging, not only the accuracy of more than optical observations, but also greatly improved operating speed, and can provide direct point of geocentric coordinates of the ground.

现代实用天文学是18世纪发展起来的，先后从理论和实践上解决了中星仪测时、太尔各特测纬以及多星等高法同时测定经度和纬度的方法，出现了经纬仪、等高仪、中星仪、天顶仪、照相天顶筒、六分仪等实用天文学仪器，最常用的是光学全能经纬仪。20世纪60年代以后实用天文学领域出现了崭新的技术，如人造卫星多普勒观测和人卫激光测距，不但精度超过光学观测，而且作业速度大大提高，并能直接提供地面点的地心坐标。

Each morning at nine o'clock all the students gathered in the Great Room for a metaphysical warm-up in preparation for the day. Fifty-three children, ranging in age from three to seven years, sat on child-sized colorful chairs or in sun-flooded patterns on the thick carpet. Each bright face was illuminated by positive thoughts and feelings as he or she eagerly anticipated the morning's songs, meditations and exploration into yet another metaphysical cranny of the mind.

每天早晨九点钟，全体学生都在大教室里集合，开始冥想练习，为当天的课程做准备。53个三到七岁不等的学生坐在五彩的儿童椅上，或坐在布满灿烂阳光图案的厚地毯上，急切地期待着早晨的颂歌、冥想和对心灵角落的哲学探索，积极向上的思想和情绪照亮了每一张欢愉的脸庞。

Six men and one woman, ranging in age from 19 to 74, died, the authorities said.

根据警方说法，受害7人中有6男1女，年龄从19岁到74岁不等。

The distribution of BMP was studied by immunohistochemical method amd analyzed by microimage analysis system in parietal bone of fetus ranging in gestation weeks from 9th to 36th.

用免疫组化技术和显微图像分析系统对第9~36 w胎儿顶骨内BMP分布及含量进行了系统观察。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。