And I tell her some new things happening in the city. When I have to go back,I am always reluctant to go. I really feel happy living in the country
瓶颈现象:bottle neck phenomena木桶原理:Cannikin Law
让我来告诉你吧：瓶颈现象 Bottleneck 木桶原理 Weakest-link principle
瓶颈现象 Bottleneck木桶原理 Weakest-link principle
Cannikin Law How much water a bucket can contain is determined by the shortest board, rather than the tallest board.
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南宫火却
