Grief often treads upon the heels of pleasure.
悲哀常常紧随快乐。乐极生悲。
Once out upon the road, Black Dog, in spite of his wound, showed a wonderful clean pair of heels and disappeared over the edge of the hill in half a minute.
“黑狗”尽管受了伤，一旦他跑到了路上，却显示出令人叫绝的脚力来，不到半分钟就消失在小丘边上。
All kind of agriculture subsidies research is closely upon heels, and most of the research is based on the influence of the behavior of farmers, but the conclusions present the divergence.
各种关于农业补贴政策的研究也接踵而来，虽然绝大部分研究都以补贴政策对农户行为的影响为主要内容，但其结论却呈现出了多样化的特征。
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