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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
- Does your handwriting slope forward or backward? 你的书法向前斜还是向后斜?
- 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。
- Youth looks forward and age backward . 青年展望未来，老人回顾过去。
- She kept moving backward ( s ) and forward ( s ). 她不停地来回走动。
- My foot caught in a creeper and I pitched forward. 藤蔓缠住我的脚，使我向前倒下。
- You can travel forward and backward through time. 你可以通过时间穿梭于过去和未来。
- Einstein put forward his new theory of relativity. 爱因斯坦提出了相对论的新学说。
- We look forward to the return of spring. 我们期待着春天的到来。
- Many activists have come forward. 涌现了大批积极分子。
- Youth looks forward and age backward. 青年展望未来，老人回顾过去。
- One step backward / forward, everyone. 向后退一步/向前进一步。
- They looked forward very much to seeing him again. 他们非常盼望再次见到他。
- He has decided to go forward with his plans. 他己决定实施自己的计划。
- She leaned forward and whispered the news to him. 她探过身去，低声把消息告诉了他。
- The sixth man went forward to feel the elephant. 第六个瞎子走上前去摸大象。
- The toy robot moved forward with quick jerky steps. 玩具机器人一颠一颠地走得很快。
- backward scatter 后向散射
- She rushed forward in contemning dangers. 她不顾危险往前冲。
