1·The heat had caused milk to go sour.
高温使牛奶变质了。
2·Food can easily go sour in warm weather.
天热时食物很容易变馊。
3·If milk is not a cool place, it will go sour.
牛奶如果不存放在阴凉处，很快就会坏了。
4·If milk is not kept in a cool place, it will go sour.
牛奶如不存放在阴凉处，很快就会变坏的。
5·Milk must be kept in a cool place, or else it will go sour.
牛奶如果不存放在阴凉处，很快就会坏了。
6·Milk must be kept in a cool place, or else it will go sour.
牛奶要放在阴凉地方，否则会发酸。
7·Milk must be kept in a cool place, or else it will go sour easily.
牛奶要放在阴凉的地方，否则就容易变酸。
8·If you keep the milk in the refrigerator, it won't go sour so quickly.
如果把牛奶保存在冰箱里，它不会那么快就变酸。
9·In some ways, it is a strange time for multinationals to go sour on China.
从某些方面来说，此时美国跨国公司对中国感到失望让人觉得奇怪。
10·Or a social interaction might go sour, with one marmot nipping or chasing another.
但同时，社交互动也可能会变得很不愉快，就像一只土拨鼠会厮咬或追逐其他同类。 “土拨鼠们对待彼此总是很粗暴。”