We try to buy stocks that are selling below their book value.
RNA干扰是一个迷人的过程，它为理解基因调控开辟了新的途径，并具有潜在的治疗应用。
Change is the only constant, and adaptability is the key to thriving.
The truth is often hidden in the spaces between words.
每部电影都是一次旅程，每个角色都是一个目的地。
"Books are the quietest and most constant of friends; they are the most accessible and wisest of counselors, and the most patient of teachers."