translation.en: Now, with all of my optimism, and I am an optimist, comes a healthy dose of caution, or rather, an urgent need to address some pressing, complex questions.
translation.zh: 现在，我乐观的同时，我可是个乐观主义者， 也有一份恰如其量的谨慎，或者，也有迫切需求 去解决一些紧迫的、 复杂的问题。