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- The pulse width of the backward scattered radiation decreases with the increase of the electron’s initial energy, and the collimation of the scattered radiation becomes better. 短脉冲激光条件下得到的后向散射光的频率上移与长脉冲激光条件下得到的后向散射光的频率上移是完全一致的，同时发现随着入射电子初始能量的增加，散射光的准直性越来越好，后向散射光脉冲的脉宽越来越短。
- Study for Backward Scattering Photoelectrical and Smoke Detector Based on Collimated Beam 基于平行光束的后向散射光电感烟探测器的研究
- He lined out for home without a backward glance. 他头也不回，急忙往家里走去。
- Small villages scatter at the foot of the mountain. 村庄零零落落地散布在山脚下。
- ratio of backward scattering of 440, 550 and 470nm and absorption value (ba/a) was largest in 1m of coast water and 0.5m in open water region. 550、670nm的后向散射与吸收的比值(b_b/a);在沿岸带的1m处最大;敞水区在0.;5m处最大。
- This part of the country is still backward. 这个国家的这个地区仍很落后。
- In some cities housing conditions went backward. 某些城市的住房条件越来越差。
- The farmers were scattering seed on the fields. 农夫把种子撒在田里。
- The teacher was patient with backward children. 那位老师对迟钝的学童十分耐心。
- When the tree falls, the monkeys scatter. 树倒猢狲散。
- He looked backward over his shoulder. 他回头向后看。
- She looked backward over her shoulder. 她回头往後看。
- I wish he would refrain from scattering his ash all over the carpet. 我希望他不要将烟灰往地毯上乱弹。
- Sheila is very clever but rather backward in expressing her ideas. 希拉很聪明，然而在表达思想时却有些腼腆。
- Although he is clever, he is backward in giving his views. 他虽然很聪明，却不善发表他的意见。
- A scatter of applause reached him when he ended his speech. 演讲结束时他听到稀稀拉拉的掌声。
- Frank was so backward that he hesitated to ask her to dance. 法兰克非常腼腆,不好意思请她跳舞。
- He had a firsthand taste of life in backward mountainous areas. 他直接体验过落後山区的生活。
- backward scatter 后向散射
- backward scattering coefficient 后向散射系数
