To the untrained eye, they are virtually impossible to spot, but we can learn to read them, quite quickly apparently -- in about an hour, according to Ekman .

对于没有经过训练的眼睛，虽然几乎没有可能能够看得出来，但是，是可以很快地学习如何去读它的---一个小时之内，根据Ekman的说法。