about the phrase“retrieval on cards” i'm trying to translate a report about how google glass might be used in education, and here's a phrase that confused me a lot, the whole sentense is given below: students can now use google now for personalised search and retrieval on cards that are tailored to their personal learning needs (based on repeated use). i can't fully understand the phrase “retrieval on cards”, i hope someone could help me understand it. and i would appreciate it a lot if someone could help me translate it into chinese.