Some people are worried that electromagnetic fields from electric power lines could increase the risk of cancer.
一些人担心电源线的电磁场可能增加患癌症的风险。'
When we are fielding, the umpires keep looking at the ball.
当我们在防守时,裁判们都盯紧了球。
I also conducted a field study among the boys about their attitude to relationships.
我也在男生中进行了一项有关他们对人际关系态度的实地调查。
the field of politics 政界