The value of unpaid work is often invisible in economic measures, yet it is the backbone of society.
无偿工作的价值在经济衡量中常常不可见，但它却是社会的支柱。
There is something profoundly mysterious about quantum mechanics that we still don't understand.
It's important to speak up for yourself and what you believe in.
Love doesn't happen suddenly. Feelings build up over time, little by little.