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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First, a heavy collar on my neck, and a bridle with great side pieces against my eyes, called blinkers.

首先，是脖子上重重的轭具，还有笼头，旁边是一大块挡住眼睛的叫马眼罩的东西。

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Fahmawi, who instead wears a single-breasted, notch-collar Aquascutum overcoat, hand-tailored in heavy wool-cashmere.

Fahmawi 则穿一件单排扣、V字领的雅格狮丹大衣，手工裁制，衣料采用厚重的羊毛加羊绒。

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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

"A lot of it had to do with the decline of heavy industry, which employed a lot of blacks and blue-collar whites, in a whole set of Rust Belt states, " he said.

CNN: Family roots lure many African-Americans back to South