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- For fast calculating the signed distance from spatial point to STL model, a reference ball method was put foward based on linear octree. 摘要针对如何快速求取空间点到STL模型表面有符号距离这一问题，提出一种基于线性八叉树的参考球方法。
- He lay back and hit the ball for four. 他向后弯身击中球，得了4分。
- The ball bounded back from the floor. 球从地址上反弹回来。
- A boy threw the ball back to the players. 一个男孩把球掷还给球员。
- The small ball dropped back to the floor. 小球又落回到地板上。
- He whammed the ball into the back of the net. 他一用力把球打到球网的后面去了。
- Rose bushes shoot again after being cut back. 玫瑰丛修剪後还能再长出新枝。
- The player threw back the ball to the wicket-keeper. 运动员将球投回给板球守门员。
- Seeing the ball coming his way, the man fell back a pace. 看到球向他飞来，这人后退了一步。
- Standard Test Method for Bursting Strength of Leather by the Ball Method 用球法测定皮革抗破碎强度的试验方法
- He trudge three hour in the snow to get back home. 他在雪中跋涉三个钟点才回到家。
- The crowd fell back to let the players through. 人群后退让运动员们通过。
- Do exercise every day and you'll be back in condition. 每天锻炼锻炼，你很快会恢复健康的。
- The ship beat back against a monsoon. 船逆着季风艰难地行驶。
- I flap the flies away but soon they fly back. 我把苍蝇赶走，但一会儿又飞回来了。
- I never lend books; you never get them back. 我的书决不外借，因为总是有去无回。
- She leaned her head back and whispered the news. 她向后仰着头，小声说出了这个消息。
- The talks have been put back to Friday morning. 谈判推迟到星期五早上进行。
- He hated to tuck his tail and back down now. 他讨厌此时夹着尾巴退回来。
- After a long coma the sick man slowly came back. 昏睡了好久以后，那个病人慢慢地恢复了活力。
