. >> so, we have to learn what the characters mean, and then how to say it in pinyin, so there's a lotfferent aspects to it than just learning uh, a different language. >> there are also a lot of different reasons why students decide to learn mandarin. >> the culture and the language has always really appealed to me. >> i really want to go to china. it's somewhere that i've always wanted to go, so i hope i'll get to go there one day and use it. [ speaking chinese ] >> chinese is a journey. experts say it's probably twice as hard to master as spanish or french. but that's not stopping many american students. the number of us learning mandarin has increased tenfold in recent years. zai jian. >> if you want to know how much a hummingbird weighs, check your pockets. a hummingbird weighs about what a penny weighs -- less than one tenth of an ounce. >> medical emergencies happen. that's why knowing what to do is so important. ♪ >> what is "cpr?" >> cpr stands for and that's a really big term that basically means cardio -- heart; pulmona