慢速英语:Two Studies Give a Lift to Running Barefoot

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例句：We generally go to the sea for our holidays.
      我们通常去海边度假。

      I generally stay at home in the evening and am not at home on Saturday evening.
      我晚上通常在家里, 而星期六晚上不在家。

2.partly adv.在一定程度上

例句：What you say is partly true.
      你所说的有几分是真实的。

部分地, 不完全地

例句：This is partly a political and partly a legal question.
      这个问题部分是政治问题, 部分是法律问题。

3.footwear n.(总称)鞋类

例句：It is a custom among the Japanese to remove their footwear before entering a house.
      脱鞋进屋是日本人的习惯。

4.observe vt.看到; 注意到

例句：Didn't you observe the difference?
      难道你没有看出差别?

      We observed that it had turned cloudy.
      我们注意到天已经变阴了。