The basis of optimism is sheer terror.

51 Pegasi b的发现是天文学的一个转折点，证明了行星可以存在于类似太阳的恒星周围。

中国石化要坚持高质量发展，把科技创新作为核心驱动力。

Your self-worth is determined by you. You don't have to depend on someone telling you who you are.

工资水平取决于工人所需的最低生活水平。