Imagine that the pig has a heavy collar and to reward the pig for walking forward, you might remove the heavy collar.

想象这头猪戴着很重的项圈，作为对这头猪向前走的奖励，你可以把沉重的项圈拿掉。

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Even the basic forward curve that promotes balance in upright walking is “not a structurally ideal solution, ” she said, since it can lead to instability and even fractured vertebrae.

甚至为直立行走增加平衡的前弯脊柱“在结构上不属于最理想的解决方式”，她说，因为它可导致身体不稳定，甚至椎骨骨折。

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A caterpillar's guts move forward first, followed by its outer body, according to X-ray studies of the insects walking on a treadmill. Molly Webster reports.

把毛毛虫放在跑步机上，再用X射线对其研究，我们发现它的内脏先向前走，然后整个身体才移动。

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So, imagine the pig has a heavy collar and to reward the pig for walking forward you might remove the heavy collar.

所以，想象这头猪带着很重的项圈,作为对这头猪向前走的奖励,你可以把项圈拿掉。

耶鲁公开课 - 心理学导论课程节选

So, you reinforce the pig for walking forward and you punish the pig for walking backward.

那你就对这头猪向前走的行为给予强化,如果它向后退，你就惩罚它。

耶鲁公开课 - 心理学导论课程节选

Last week, Capt Jon Miller said he was looking forward to walking through Market Drayton.

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"You know, I think about the pictures of the young men and women that you'd see in the civil rights movement, you know, well-dressed, backs straight, walking forward into something they're doing for themselves, for their family members and for those that are yet unborn, and I try to think about that in the work that I do every single day here, " Strautmanis said.

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He said his father loved walking and had been looking forward to seeing the spring blossom around Stirling.

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