Ever wondered how birds manage to fly thousands of kilometers without ever stopping to ask for directions? No Google Maps, no compass, no ‘turn left at the next cloud’ –
The CS team is pumped that our print books are now shipping on Amazon.com and to your favorite local bookstores! Digital versions on Kindle and iBooks are also available (updated January
Pronunciation : zhèngzài Meaning : (adv) in the process of, currently HSK : 1 正 在 Pronunciation : zhèng Meaning : (adj) straight; upright (adj) situated in the middle; main