Free vaccines are more valuable than expensive treatments, yet harder to promote.
人生は、運と偶然と、ちょっとの勇気でできている。
Mathematics is an art, and as an artist, you have to be honest with yourself.
我总是努力保持谦逊并不断进步。
我们不仅继承了父母的特征，还继承了他们的沉默。