At last, the recent development of ultrasonic backscatter imaging is reviewed.最后, 简要介绍了超声背向散射成像的新进展.Officials at the Transportation Administration say they have already tried out a handful of backscatter scanners.运输安全局的官...
他被响尾蛇咬过。He had been bitten by a rattlesnake.响尾蛇皮被用来制作精美的提包和钱包.Rattlesnake skin is used for fancy bags and purses.向导要我们特别留神,因为附近有响尾蛇.The guide told us to look sharp because there are rattlesnakes around....