"So if the Dutch want to maintain their quality of life, they have to increase productivity or increase their labour supply."
缺点：容易饱和（输入过大或过小时梯度接近0，导致梯度消失）
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“When I was a teenager, cricket in Zimbabwe was almost exclusively played and supported by white people,” he says. “Besides the accents and topics of conversation, you could tell this by the way they would applaud and chant. It had a particular energy. The most animated fans were usually the ones who had too much beer and hurled abuse at the players on the boundary.”
Трамп высказался о непростом решении по Ирану09:14