我们回收和循环利用的每一块塑料都是迈向更清洁地球的一步。
Every piece of plastic we recover and recycle is a step toward a cleaner planet.
It is in your self-interest to find a way to be very tender.
"You have to be able to confront reality but also inspire hope."
The only way to learn mathematics is to do mathematics.
I don't like to gamble, but if there's one thing I'm willing to bet on, it's myself.