The detection abilities of these plants are similar to or better than those of dogs, Professor Medford said.
而梅德福教授认为这些植物的侦查能力类似于，甚至高于犬类的侦查能力。
2
The fluidity of perceptions of past presidents reflects contemporary concerns, according to Edna Medford, a survey leader and participant.
调查负责人及参与者埃德娜。梅德福说，排名的变动受到如今人们关注点的影响。
3
'Plants can't run or hide from threats,' Professor Medford said, 'so they've developed sophisticated systems to detect and respond to their environment.'