这也对劳动力供给和养老金制度提出了挑战。
It also challenges the labor force supply and the pension system.
上个世纪左右的艺术潮流无疑对这一观念提出了挑战。
Trends in art in the last century or so certainly challenge that idea.
最近发表在《国家科学院院刊》上的一项新研究对这一乐观前景提出了挑战。
A new study, just published in the Proceedings of the National Academy of Sciences challenges the rosy picture.
But this is where for lack of a better term non-western countries really formally challenged at the highest levels and the lowest, too.
之所以这么说,是因为找不到更好的表达方式了,这表明非西方国家,从最高层面和最低层面都提出了挑战。
Well recall from week zero when we took a very real world phonebook and then just last week we had our volunteer come up with the array of pieces of paper on the board and when I challenged myself and when I challenged our volunteer to find me the number 50 both he and I were able 50 to leverage one assumption.
大家回忆一下,当我们拿着一个现实世界的电话簿,就在上周我们的志愿者,在黑板上提出了纸片的阵列,我挑战自己,也挑战志愿者,要找出同一个,数字。
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