These findings callintoquestion the effectiveness of many supplements on supermarket shelves.
这些发现都在质疑超市货架上很多补充剂的效力。
2
And mixed economic signals continue to callintoquestion how long it will take for the country to emerge from recession.
有好有坏的经济信号继续使人们怀疑美国将需要多长时间来走出经济衰退。
3
In other words, whereas the new satellite measurements callintoquestion computer models of solar output, it does not change the fundamental physics of human-induced global warming.